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Finding the Fourth Proportional to 138,732.60, 208,196.10 and 88,933.80

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Solution

The fourth proportional to 138,732.60, 208,196.10 and 88,933.80 is: 133,463.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,732.60 : 208,196.10 = 88,933.80 : x
  2. Step 2: Convert to fraction form
    138,732.60/208,196.10 = 88,933.80/x
  3. Step 3: Cross multiply
    138,732.60x = 208,196.10 × 88,933.80
  4. Step 4: Simplify right side
    138,732.60x = 18,515,670,318.18
  5. Step 5: Solve for x
    x = 18,515,670,318.18/138,732.60
  6. Step 6: Final answer
    x = 133,463.01

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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.