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Finding the Fourth Proportional to 125,289.86, 172,925.14 and 74,330.89

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Solution

The fourth proportional to 125,289.86, 172,925.14 and 74,330.89 is: 102,591.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,289.86 : 172,925.14 = 74,330.89 : x
  2. Step 2: Convert to fraction form
    125,289.86/172,925.14 = 74,330.89/x
  3. Step 3: Cross multiply
    125,289.86x = 172,925.14 × 74,330.89
  4. Step 4: Simplify right side
    125,289.86x = 12,853,678,694.95
  5. Step 5: Solve for x
    x = 12,853,678,694.95/125,289.86
  6. Step 6: Final answer
    x = 102,591.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.