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Finding the Fourth Proportional to 138,156.54, 207,234.80 and 38,316.73

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Solution

The fourth proportional to 138,156.54, 207,234.80 and 38,316.73 is: 57,475.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,156.54 : 207,234.80 = 38,316.73 : x
  2. Step 2: Convert to fraction form
    138,156.54/207,234.80 = 38,316.73/x
  3. Step 3: Cross multiply
    138,156.54x = 207,234.80 × 38,316.73
  4. Step 4: Simplify right side
    138,156.54x = 7,940,559,593.02
  5. Step 5: Solve for x
    x = 7,940,559,593.02/138,156.54
  6. Step 6: Final answer
    x = 57,475.09

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1.5x scale

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.