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Finding the Fourth Proportional to 73,079.80, 109,619.70 and 20,498.20

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Solution

The fourth proportional to 73,079.80, 109,619.70 and 20,498.20 is: 30,747.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,079.80 : 109,619.70 = 20,498.20 : x
  2. Step 2: Convert to fraction form
    73,079.80/109,619.70 = 20,498.20/x
  3. Step 3: Cross multiply
    73,079.80x = 109,619.70 × 20,498.20
  4. Step 4: Simplify right side
    73,079.80x = 2,247,006,534.54
  5. Step 5: Solve for x
    x = 2,247,006,534.54/73,079.80
  6. Step 6: Final answer
    x = 30,747.30

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Similar ratio
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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.