Home / 83,121.12-124,681.68-20,791.62

Finding the Fourth Proportional to 83,121.12, 124,681.68 and 20,791.62

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Solution

The fourth proportional to 83,121.12, 124,681.68 and 20,791.62 is: 31,187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,121.12 : 124,681.68 = 20,791.62 : x
  2. Step 2: Convert to fraction form
    83,121.12/124,681.68 = 20,791.62/x
  3. Step 3: Cross multiply
    83,121.12x = 124,681.68 × 20,791.62
  4. Step 4: Simplify right side
    83,121.12x = 2,592,334,111.52
  5. Step 5: Solve for x
    x = 2,592,334,111.52/83,121.12
  6. Step 6: Final answer
    x = 31,187.43

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Similar ratio
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1.5x scale

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.