Finding the Fourth Proportional to 128,513,117.79, 177,494,121.45 and 86,624,938.17
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Solution
The fourth proportional to 128,513,117.79, 177,494,121.45 and 86,624,938.17 is: 119,640,839.48
Step by Step Solution
- Step 1: Write the proportion equation
128,513,117.79 : 177,494,121.45 = 86,624,938.17 : x - Step 2: Convert to fraction form
128,513,117.79/177,494,121.45 = 86,624,938.17/x - Step 3: Cross multiply
128,513,117.79x = 177,494,121.45 × 86,624,938.17 - Step 4: Simplify right side
128,513,117.79x = 15,375,417,296,144,720 - Step 5: Solve for x
x = 15,375,417,296,144,720/128,513,117.79 - Step 6: Final answer
x = 119,640,839.48
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.