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Finding the Fourth Proportional to 138,154.80, 207,243.90 and 38,314.98

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Solution

The fourth proportional to 138,154.80, 207,243.90 and 38,314.98 is: 57,475.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154.80 : 207,243.90 = 38,314.98 : x
  2. Step 2: Convert to fraction form
    138,154.80/207,243.90 = 38,314.98/x
  3. Step 3: Cross multiply
    138,154.80x = 207,243.90 × 38,314.98
  4. Step 4: Simplify right side
    138,154.80x = 7,940,545,883.62
  5. Step 5: Solve for x
    x = 7,940,545,883.62/138,154.80
  6. Step 6: Final answer
    x = 57,475.71

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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.