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Finding the Fourth Proportional to 80,357.76, 120,381.12 and 61,799.04

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Solution

The fourth proportional to 80,357.76, 120,381.12 and 61,799.04 is: 92,578.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,357.76 : 120,381.12 = 61,799.04 : x
  2. Step 2: Convert to fraction form
    80,357.76/120,381.12 = 61,799.04/x
  3. Step 3: Cross multiply
    80,357.76x = 120,381.12 × 61,799.04
  4. Step 4: Simplify right side
    80,357.76x = 7,439,437,650.12
  5. Step 5: Solve for x
    x = 7,439,437,650.12/80,357.76
  6. Step 6: Final answer
    x = 92,578.96

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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.