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Finding the Fourth Proportional to 144,781.79, 216,182.39 and 129,691.49

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Solution

The fourth proportional to 144,781.79, 216,182.39 and 129,691.49 is: 193,650.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,781.79 : 216,182.39 = 129,691.49 : x
  2. Step 2: Convert to fraction form
    144,781.79/216,182.39 = 129,691.49/x
  3. Step 3: Cross multiply
    144,781.79x = 216,182.39 × 129,691.49
  4. Step 4: Simplify right side
    144,781.79x = 28,037,016,270.86
  5. Step 5: Solve for x
    x = 28,037,016,270.86/144,781.79
  6. Step 6: Final answer
    x = 193,650.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.