Home / 80,378.43-120,543.02-55,577.85

Finding the Fourth Proportional to 80,378.43, 120,543.02 and 55,577.85

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Solution

The fourth proportional to 80,378.43, 120,543.02 and 55,577.85 is: 83,349.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,378.43 : 120,543.02 = 55,577.85 : x
  2. Step 2: Convert to fraction form
    80,378.43/120,543.02 = 55,577.85/x
  3. Step 3: Cross multiply
    80,378.43x = 120,543.02 × 55,577.85
  4. Step 4: Simplify right side
    80,378.43x = 6,699,521,884.11
  5. Step 5: Solve for x
    x = 6,699,521,884.11/80,378.43
  6. Step 6: Final answer
    x = 83,349.75

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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.