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Finding the Fourth Proportional to 138,838.76, 208,266.20 and 39,006.73

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Solution

The fourth proportional to 138,838.76, 208,266.20 and 39,006.73 is: 58,512.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,838.76 : 208,266.20 = 39,006.73 : x
  2. Step 2: Convert to fraction form
    138,838.76/208,266.20 = 39,006.73/x
  3. Step 3: Cross multiply
    138,838.76x = 208,266.20 × 39,006.73
  4. Step 4: Simplify right side
    138,838.76x = 8,123,783,431.53
  5. Step 5: Solve for x
    x = 8,123,783,431.53/138,838.76
  6. Step 6: Final answer
    x = 58,512.36

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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.