Home / 80,748.80-121,123.20-51,224.30

Finding the Fourth Proportional to 80,748.80, 121,123.20 and 51,224.30

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Solution

The fourth proportional to 80,748.80, 121,123.20 and 51,224.30 is: 76,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,748.80 : 121,123.20 = 51,224.30 : x
  2. Step 2: Convert to fraction form
    80,748.80/121,123.20 = 51,224.30/x
  3. Step 3: Cross multiply
    80,748.80x = 121,123.20 × 51,224.30
  4. Step 4: Simplify right side
    80,748.80x = 6,204,451,133.76
  5. Step 5: Solve for x
    x = 6,204,451,133.76/80,748.80
  6. Step 6: Final answer
    x = 76,836.45

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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.