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Finding the Fourth Proportional to 79,490.92, 118,976.76 and 58,425.40

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Solution

The fourth proportional to 79,490.92, 118,976.76 and 58,425.40 is: 87,447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,490.92 : 118,976.76 = 58,425.40 : x
  2. Step 2: Convert to fraction form
    79,490.92/118,976.76 = 58,425.40/x
  3. Step 3: Cross multiply
    79,490.92x = 118,976.76 × 58,425.40
  4. Step 4: Simplify right side
    79,490.92x = 6,951,264,793.70
  5. Step 5: Solve for x
    x = 6,951,264,793.70/79,490.92
  6. Step 6: Final answer
    x = 87,447.28

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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.