Home / 80,950.10-121,372.35-72,655.70

Finding the Fourth Proportional to 80,950.10, 121,372.35 and 72,655.70

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Solution

The fourth proportional to 80,950.10, 121,372.35 and 72,655.70 is: 108,936.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,950.10 : 121,372.35 = 72,655.70 : x
  2. Step 2: Convert to fraction form
    80,950.10/121,372.35 = 72,655.70/x
  3. Step 3: Cross multiply
    80,950.10x = 121,372.35 × 72,655.70
  4. Step 4: Simplify right side
    80,950.10x = 8,818,393,049.90
  5. Step 5: Solve for x
    x = 8,818,393,049.90/80,950.10
  6. Step 6: Final answer
    x = 108,936.16

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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.