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Finding the Fourth Proportional to 138,706.68, 208,402.38 and 88,808.52

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Solution

The fourth proportional to 138,706.68, 208,402.38 and 88,808.52 is: 133,431.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,706.68 : 208,402.38 = 88,808.52 : x
  2. Step 2: Convert to fraction form
    138,706.68/208,402.38 = 88,808.52/x
  3. Step 3: Cross multiply
    138,706.68x = 208,402.38 × 88,808.52
  4. Step 4: Simplify right side
    138,706.68x = 18,507,906,932.28
  5. Step 5: Solve for x
    x = 18,507,906,932.28/138,706.68
  6. Step 6: Final answer
    x = 133,431.98

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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.