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Finding the Fourth Proportional to 124,200, 171,439.20 and 73,897.92

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Solution

The fourth proportional to 124,200, 171,439.20 and 73,897.92 is: 102,004.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,200 : 171,439.20 = 73,897.92 : x
  2. Step 2: Convert to fraction form
    124,200/171,439.20 = 73,897.92/x
  3. Step 3: Cross multiply
    124,200x = 171,439.20 × 73,897.92
  4. Step 4: Simplify right side
    124,200x = 12,669,000,286.46
  5. Step 5: Solve for x
    x = 12,669,000,286.46/124,200
  6. Step 6: Final answer
    x = 102,004.83

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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.