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Finding the Fourth Proportional to 116,788, 161,167.62 and 66,487

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Solution

The fourth proportional to 116,788, 161,167.62 and 66,487 is: 91,752.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,788 : 161,167.62 = 66,487 : x
  2. Step 2: Convert to fraction form
    116,788/161,167.62 = 66,487/x
  3. Step 3: Cross multiply
    116,788x = 161,167.62 × 66,487
  4. Step 4: Simplify right side
    116,788x = 10,715,551,550.94
  5. Step 5: Solve for x
    x = 10,715,551,550.94/116,788
  6. Step 6: Final answer
    x = 91,752.16

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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.