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Finding the Fourth Proportional to 73,146.80, 109,720.20 and 20,565.20

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Solution

The fourth proportional to 73,146.80, 109,720.20 and 20,565.20 is: 30,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,146.80 : 109,720.20 = 20,565.20 : x
  2. Step 2: Convert to fraction form
    73,146.80/109,720.20 = 20,565.20/x
  3. Step 3: Cross multiply
    73,146.80x = 109,720.20 × 20,565.20
  4. Step 4: Simplify right side
    73,146.80x = 2,256,417,857.04
  5. Step 5: Solve for x
    x = 2,256,417,857.04/73,146.80
  6. Step 6: Final answer
    x = 30,847.80

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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.