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Finding the Fourth Proportional to 72,937.60, 109,404.80 and 20,345.60

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Solution

The fourth proportional to 72,937.60, 109,404.80 and 20,345.60 is: 30,517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.60 : 109,404.80 = 20,345.60 : x
  2. Step 2: Convert to fraction form
    72,937.60/109,404.80 = 20,345.60/x
  3. Step 3: Cross multiply
    72,937.60x = 109,404.80 × 20,345.60
  4. Step 4: Simplify right side
    72,937.60x = 2,225,906,298.88
  5. Step 5: Solve for x
    x = 2,225,906,298.88/72,937.60
  6. Step 6: Final answer
    x = 30,517.95

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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.