Home / 80,976.30-121,464.45-71,134.80

Finding the Fourth Proportional to 80,976.30, 121,464.45 and 71,134.80

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Solution

The fourth proportional to 80,976.30, 121,464.45 and 71,134.80 is: 106,702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,976.30 : 121,464.45 = 71,134.80 : x
  2. Step 2: Convert to fraction form
    80,976.30/121,464.45 = 71,134.80/x
  3. Step 3: Cross multiply
    80,976.30x = 121,464.45 × 71,134.80
  4. Step 4: Simplify right side
    80,976.30x = 8,640,349,357.86
  5. Step 5: Solve for x
    x = 8,640,349,357.86/80,976.30
  6. Step 6: Final answer
    x = 106,702.20

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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.