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Finding the Fourth Proportional to 117,781.80, 162,543.16 and 67,490.52

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Solution

The fourth proportional to 117,781.80, 162,543.16 and 67,490.52 is: 93,139.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,781.80 : 162,543.16 = 67,490.52 : x
  2. Step 2: Convert to fraction form
    117,781.80/162,543.16 = 67,490.52/x
  3. Step 3: Cross multiply
    117,781.80x = 162,543.16 × 67,490.52
  4. Step 4: Simplify right side
    117,781.80x = 10,970,121,486.04
  5. Step 5: Solve for x
    x = 10,970,121,486.04/117,781.80
  6. Step 6: Final answer
    x = 93,139.36

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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.