Home / 80,930.40-121,395.60-25,519.20

Finding the Fourth Proportional to 80,930.40, 121,395.60 and 25,519.20

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Solution

The fourth proportional to 80,930.40, 121,395.60 and 25,519.20 is: 38,278.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,930.40 : 121,395.60 = 25,519.20 : x
  2. Step 2: Convert to fraction form
    80,930.40/121,395.60 = 25,519.20/x
  3. Step 3: Cross multiply
    80,930.40x = 121,395.60 × 25,519.20
  4. Step 4: Simplify right side
    80,930.40x = 3,097,918,595.52
  5. Step 5: Solve for x
    x = 3,097,918,595.52/80,930.40
  6. Step 6: Final answer
    x = 38,278.80

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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.