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Finding the Fourth Proportional to 82,959.40, 124,439.08 and 20,629.90

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Solution

The fourth proportional to 82,959.40, 124,439.08 and 20,629.90 is: 30,944.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,959.40 : 124,439.08 = 20,629.90 : x
  2. Step 2: Convert to fraction form
    82,959.40/124,439.08 = 20,629.90/x
  3. Step 3: Cross multiply
    82,959.40x = 124,439.08 × 20,629.90
  4. Step 4: Simplify right side
    82,959.40x = 2,567,165,776.49
  5. Step 5: Solve for x
    x = 2,567,165,776.49/82,959.40
  6. Step 6: Final answer
    x = 30,944.85

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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.