Home / 91,819.92-137,990.04-54,387.12

Finding the Fourth Proportional to 91,819.92, 137,990.04 and 54,387.12

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Solution

The fourth proportional to 91,819.92, 137,990.04 and 54,387.12 is: 81,734.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,819.92 : 137,990.04 = 54,387.12 : x
  2. Step 2: Convert to fraction form
    91,819.92/137,990.04 = 54,387.12/x
  3. Step 3: Cross multiply
    91,819.92x = 137,990.04 × 54,387.12
  4. Step 4: Simplify right side
    91,819.92x = 7,504,880,864.28
  5. Step 5: Solve for x
    x = 7,504,880,864.28/91,819.92
  6. Step 6: Final answer
    x = 81,734.78

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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.