Home / 82,759.25-124,139.19-20,429.75

Finding the Fourth Proportional to 82,759.25, 124,139.19 and 20,429.75

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Solution

The fourth proportional to 82,759.25, 124,139.19 and 20,429.75 is: 30,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,759.25 : 124,139.19 = 20,429.75 : x
  2. Step 2: Convert to fraction form
    82,759.25/124,139.19 = 20,429.75/x
  3. Step 3: Cross multiply
    82,759.25x = 124,139.19 × 20,429.75
  4. Step 4: Simplify right side
    82,759.25x = 2,536,132,616.90
  5. Step 5: Solve for x
    x = 2,536,132,616.90/82,759.25
  6. Step 6: Final answer
    x = 30,644.70

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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.