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Finding the Fourth Proportional to 73,125.80, 109,688.70 and 20,544.20

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Solution

The fourth proportional to 73,125.80, 109,688.70 and 20,544.20 is: 30,816.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,125.80 : 109,688.70 = 20,544.20 : x
  2. Step 2: Convert to fraction form
    73,125.80/109,688.70 = 20,544.20/x
  3. Step 3: Cross multiply
    73,125.80x = 109,688.70 × 20,544.20
  4. Step 4: Simplify right side
    73,125.80x = 2,253,466,590.54
  5. Step 5: Solve for x
    x = 2,253,466,590.54/73,125.80
  6. Step 6: Final answer
    x = 30,816.30

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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.