Home / 83,721.90-125,364.15-79,785.30

Finding the Fourth Proportional to 83,721.90, 125,364.15 and 79,785.30

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Solution

The fourth proportional to 83,721.90, 125,364.15 and 79,785.30 is: 119,469.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,721.90 : 125,364.15 = 79,785.30 : x
  2. Step 2: Convert to fraction form
    83,721.90/125,364.15 = 79,785.30/x
  3. Step 3: Cross multiply
    83,721.90x = 125,364.15 × 79,785.30
  4. Step 4: Simplify right side
    83,721.90x = 10,002,216,317.00
  5. Step 5: Solve for x
    x = 10,002,216,317.00/83,721.90
  6. Step 6: Final answer
    x = 119,469.53

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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.