Home / 80,861.60-121,249.20-28,272.80

Finding the Fourth Proportional to 80,861.60, 121,249.20 and 28,272.80

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Solution

The fourth proportional to 80,861.60, 121,249.20 and 28,272.80 is: 42,394.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861.60 : 121,249.20 = 28,272.80 : x
  2. Step 2: Convert to fraction form
    80,861.60/121,249.20 = 28,272.80/x
  3. Step 3: Cross multiply
    80,861.60x = 121,249.20 × 28,272.80
  4. Step 4: Simplify right side
    80,861.60x = 3,428,054,381.76
  5. Step 5: Solve for x
    x = 3,428,054,381.76/80,861.60
  6. Step 6: Final answer
    x = 42,394.10

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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.