Home / 80,786.40-121,251.60-47,464.80

Finding the Fourth Proportional to 80,786.40, 121,251.60 and 47,464.80

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Solution

The fourth proportional to 80,786.40, 121,251.60 and 47,464.80 is: 71,239.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,786.40 : 121,251.60 = 47,464.80 : x
  2. Step 2: Convert to fraction form
    80,786.40/121,251.60 = 47,464.80/x
  3. Step 3: Cross multiply
    80,786.40x = 121,251.60 × 47,464.80
  4. Step 4: Simplify right side
    80,786.40x = 5,755,182,943.68
  5. Step 5: Solve for x
    x = 5,755,182,943.68/80,786.40
  6. Step 6: Final answer
    x = 71,239.50

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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.