Home / 83,930.20-125,895.30-76,931.80

Finding the Fourth Proportional to 83,930.20, 125,895.30 and 76,931.80

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Solution

The fourth proportional to 83,930.20, 125,895.30 and 76,931.80 is: 115,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,930.20 : 125,895.30 = 76,931.80 : x
  2. Step 2: Convert to fraction form
    83,930.20/125,895.30 = 76,931.80/x
  3. Step 3: Cross multiply
    83,930.20x = 125,895.30 × 76,931.80
  4. Step 4: Simplify right side
    83,930.20x = 9,685,352,040.54
  5. Step 5: Solve for x
    x = 9,685,352,040.54/83,930.20
  6. Step 6: Final answer
    x = 115,397.70

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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.