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Finding the Fourth Proportional to 80,600.57, 120,900.70 and 21,436.30

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Solution

The fourth proportional to 80,600.57, 120,900.70 and 21,436.30 is: 32,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,600.57 : 120,900.70 = 21,436.30 : x
  2. Step 2: Convert to fraction form
    80,600.57/120,900.70 = 21,436.30/x
  3. Step 3: Cross multiply
    80,600.57x = 120,900.70 × 21,436.30
  4. Step 4: Simplify right side
    80,600.57x = 2,591,663,173.26
  5. Step 5: Solve for x
    x = 2,591,663,173.26/80,600.57
  6. Step 6: Final answer
    x = 32,154.40

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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.