Magento – How to add different prices for the same product

First load currency loaded currency rates the multiple with product price

 $Product=Mage:getModel('catalog/product')->load($productId);
        $currencyModel = Mage::getModel('directory/currency');
        $currencies = $currencyModel->getConfigAllowCurrencies();
 $baseCurrencyCode = Mage::app()->getStore()->getBaseCurrencyCode();

        $defaultCurrencies = $currencyModel->getConfigBaseCurrencies();

                $rates=$currencyModel->getCurrencyRates($defaultCurrencies, $currencies);


                foreach($rates[$baseCurrencyCode] as $key=>$value  ) {
                    echo $key."-";
                    echo $price=$value*$Product->getPrice();
                    echo "<br/>";

                }

For this case,you can use Custom options,Make a dropdown custom option and as per as magento,you can set different price for custom option of each custom value.

Note:it does not manage inventory as option wise