Home / 80,741.15-120,815.51-67,381.17

Finding the Fourth Proportional to 80,741.15, 120,815.51 and 67,381.17

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Solution

The fourth proportional to 80,741.15, 120,815.51 and 67,381.17 is: 100,824.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,741.15 : 120,815.51 = 67,381.17 : x
  2. Step 2: Convert to fraction form
    80,741.15/120,815.51 = 67,381.17/x
  3. Step 3: Cross multiply
    80,741.15x = 120,815.51 × 67,381.17
  4. Step 4: Simplify right side
    80,741.15x = 8,140,690,417.95
  5. Step 5: Solve for x
    x = 8,140,690,417.95/80,741.15
  6. Step 6: Final answer
    x = 100,824.55

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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.