Home / 78,740.60-118,122.79-25,414.75

Finding the Fourth Proportional to 78,740.60, 118,122.79 and 25,414.75

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Solution

The fourth proportional to 78,740.60, 118,122.79 and 25,414.75 is: 38,125.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,740.60 : 118,122.79 = 25,414.75 : x
  2. Step 2: Convert to fraction form
    78,740.60/118,122.79 = 25,414.75/x
  3. Step 3: Cross multiply
    78,740.60x = 118,122.79 × 25,414.75
  4. Step 4: Simplify right side
    78,740.60x = 3,002,061,177.15
  5. Step 5: Solve for x
    x = 3,002,061,177.15/78,740.60
  6. Step 6: Final answer
    x = 38,125.97

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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.