Home / 80,765.60-121,105.20-28,176.80

Finding the Fourth Proportional to 80,765.60, 121,105.20 and 28,176.80

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Solution

The fourth proportional to 80,765.60, 121,105.20 and 28,176.80 is: 42,250.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,765.60 : 121,105.20 = 28,176.80 : x
  2. Step 2: Convert to fraction form
    80,765.60/121,105.20 = 28,176.80/x
  3. Step 3: Cross multiply
    80,765.60x = 121,105.20 × 28,176.80
  4. Step 4: Simplify right side
    80,765.60x = 3,412,356,999.36
  5. Step 5: Solve for x
    x = 3,412,356,999.36/80,765.60
  6. Step 6: Final answer
    x = 42,250.13

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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.