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Finding the Fourth Proportional to 80,416.46, 120,813.17 and 75,872.10

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Solution

The fourth proportional to 80,416.46, 120,813.17 and 75,872.10 is: 113,985.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,416.46 : 120,813.17 = 75,872.10 : x
  2. Step 2: Convert to fraction form
    80,416.46/120,813.17 = 75,872.10/x
  3. Step 3: Cross multiply
    80,416.46x = 120,813.17 × 75,872.10
  4. Step 4: Simplify right side
    80,416.46x = 9,166,348,536.20
  5. Step 5: Solve for x
    x = 9,166,348,536.20/80,416.46
  6. Step 6: Final answer
    x = 113,985.98

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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.