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Finding the Fourth Proportional to 132,920.40, 199,391.39 and 39,425.88

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Solution

The fourth proportional to 132,920.40, 199,391.39 and 39,425.88 is: 59,142.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,920.40 : 199,391.39 = 39,425.88 : x
  2. Step 2: Convert to fraction form
    132,920.40/199,391.39 = 39,425.88/x
  3. Step 3: Cross multiply
    132,920.40x = 199,391.39 × 39,425.88
  4. Step 4: Simplify right side
    132,920.40x = 7,861,181,015.17
  5. Step 5: Solve for x
    x = 7,861,181,015.17/132,920.40
  6. Step 6: Final answer
    x = 59,142.02

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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.