Finding the Fourth Proportional to 261,391,983.48, 392,130,566.08 and 77,178,081.06
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Solution
The fourth proportional to 261,391,983.48, 392,130,566.08 and 77,178,081.06 is: 115,779,696.88
Step by Step Solution
- Step 1: Write the proportion equation
261,391,983.48 : 392,130,566.08 = 77,178,081.06 : x - Step 2: Convert to fraction form
261,391,983.48/392,130,566.08 = 77,178,081.06/x - Step 3: Cross multiply
261,391,983.48x = 392,130,566.08 × 77,178,081.06 - Step 4: Simplify right side
261,391,983.48x = 30,263,884,615,025,928 - Step 5: Solve for x
x = 30,263,884,615,025,928/261,391,983.48 - Step 6: Final answer
x = 115,779,696.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.