Home / 80,764.40-121,218.60-47,442.80

Finding the Fourth Proportional to 80,764.40, 121,218.60 and 47,442.80

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Solution

The fourth proportional to 80,764.40, 121,218.60 and 47,442.80 is: 71,206.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,764.40 : 121,218.60 = 47,442.80 : x
  2. Step 2: Convert to fraction form
    80,764.40/121,218.60 = 47,442.80/x
  3. Step 3: Cross multiply
    80,764.40x = 121,218.60 × 47,442.80
  4. Step 4: Simplify right side
    80,764.40x = 5,750,949,796.08
  5. Step 5: Solve for x
    x = 5,750,949,796.08/80,764.40
  6. Step 6: Final answer
    x = 71,206.49

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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.