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Finding the Fourth Proportional to 137,287.20, 205,712.10 and 101,857.80

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Solution

The fourth proportional to 137,287.20, 205,712.10 and 101,857.80 is: 152,624.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,287.20 : 205,712.10 = 101,857.80 : x
  2. Step 2: Convert to fraction form
    137,287.20/205,712.10 = 101,857.80/x
  3. Step 3: Cross multiply
    137,287.20x = 205,712.10 × 101,857.80
  4. Step 4: Simplify right side
    137,287.20x = 20,953,381,939.38
  5. Step 5: Solve for x
    x = 20,953,381,939.38/137,287.20
  6. Step 6: Final answer
    x = 152,624.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.