Home / 82,920.12-124,378.90-20,591.16

Finding the Fourth Proportional to 82,920.12, 124,378.90 and 20,591.16

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Solution

The fourth proportional to 82,920.12, 124,378.90 and 20,591.16 is: 30,886.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,920.12 : 124,378.90 = 20,591.16 : x
  2. Step 2: Convert to fraction form
    82,920.12/124,378.90 = 20,591.16/x
  3. Step 3: Cross multiply
    82,920.12x = 124,378.90 × 20,591.16
  4. Step 4: Simplify right side
    82,920.12x = 2,561,105,830.52
  5. Step 5: Solve for x
    x = 2,561,105,830.52/82,920.12
  6. Step 6: Final answer
    x = 30,886.42

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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.