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Finding the Fourth Proportional to 151,710.91, 209,359.13 and 87,179.38

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Solution

The fourth proportional to 151,710.91, 209,359.13 and 87,179.38 is: 120,306.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,710.91 : 209,359.13 = 87,179.38 : x
  2. Step 2: Convert to fraction form
    151,710.91/209,359.13 = 87,179.38/x
  3. Step 3: Cross multiply
    151,710.91x = 209,359.13 × 87,179.38
  4. Step 4: Simplify right side
    151,710.91x = 18,251,799,150.74
  5. Step 5: Solve for x
    x = 18,251,799,150.74/151,710.91
  6. Step 6: Final answer
    x = 120,306.44

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1.5x scale

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.