Home / 82,439.28-123,657.12-20,109.60

Finding the Fourth Proportional to 82,439.28, 123,657.12 and 20,109.60

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Solution

The fourth proportional to 82,439.28, 123,657.12 and 20,109.60 is: 30,163.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,439.28 : 123,657.12 = 20,109.60 : x
  2. Step 2: Convert to fraction form
    82,439.28/123,657.12 = 20,109.60/x
  3. Step 3: Cross multiply
    82,439.28x = 123,657.12 × 20,109.60
  4. Step 4: Simplify right side
    82,439.28x = 2,486,695,220.35
  5. Step 5: Solve for x
    x = 2,486,695,220.35/82,439.28
  6. Step 6: Final answer
    x = 30,163.96

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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.