Home / 82,721.25-124,082.28-20,391.75

Finding the Fourth Proportional to 82,721.25, 124,082.28 and 20,391.75

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Solution

The fourth proportional to 82,721.25, 124,082.28 and 20,391.75 is: 30,587.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,721.25 : 124,082.28 = 20,391.75 : x
  2. Step 2: Convert to fraction form
    82,721.25/124,082.28 = 20,391.75/x
  3. Step 3: Cross multiply
    82,721.25x = 124,082.28 × 20,391.75
  4. Step 4: Simplify right side
    82,721.25x = 2,530,254,833.19
  5. Step 5: Solve for x
    x = 2,530,254,833.19/82,721.25
  6. Step 6: Final answer
    x = 30,587.72

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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.