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Finding the Fourth Proportional to 125,937.76, 188,906.40 and 86,374.93

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Solution

The fourth proportional to 125,937.76, 188,906.40 and 86,374.93 is: 129,562.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,937.76 : 188,906.40 = 86,374.93 : x
  2. Step 2: Convert to fraction form
    125,937.76/188,906.40 = 86,374.93/x
  3. Step 3: Cross multiply
    125,937.76x = 188,906.40 × 86,374.93
  4. Step 4: Simplify right side
    125,937.76x = 16,316,777,076.55
  5. Step 5: Solve for x
    x = 16,316,777,076.55/125,937.76
  6. Step 6: Final answer
    x = 129,562.23

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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.