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Finding the Fourth Proportional to 80,496.60, 120,744.90 and 79,978.20

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Solution

The fourth proportional to 80,496.60, 120,744.90 and 79,978.20 is: 119,967.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,496.60 : 120,744.90 = 79,978.20 : x
  2. Step 2: Convert to fraction form
    80,496.60/120,744.90 = 79,978.20/x
  3. Step 3: Cross multiply
    80,496.60x = 120,744.90 × 79,978.20
  4. Step 4: Simplify right side
    80,496.60x = 9,656,959,761.18
  5. Step 5: Solve for x
    x = 9,656,959,761.18/80,496.60
  6. Step 6: Final answer
    x = 119,967.30

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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.