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Finding the Fourth Proportional to 83,659.89, 125,489.06 and 20,480.30

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Solution

The fourth proportional to 83,659.89, 125,489.06 and 20,480.30 is: 30,720.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,659.89 : 125,489.06 = 20,480.30 : x
  2. Step 2: Convert to fraction form
    83,659.89/125,489.06 = 20,480.30/x
  3. Step 3: Cross multiply
    83,659.89x = 125,489.06 × 20,480.30
  4. Step 4: Simplify right side
    83,659.89x = 2,570,053,595.52
  5. Step 5: Solve for x
    x = 2,570,053,595.52/83,659.89
  6. Step 6: Final answer
    x = 30,720.26

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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.