Home / 80,963.70-121,445.55-77,853.30

Finding the Fourth Proportional to 80,963.70, 121,445.55 and 77,853.30

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Solution

The fourth proportional to 80,963.70, 121,445.55 and 77,853.30 is: 116,779.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,963.70 : 121,445.55 = 77,853.30 : x
  2. Step 2: Convert to fraction form
    80,963.70/121,445.55 = 77,853.30/x
  3. Step 3: Cross multiply
    80,963.70x = 121,445.55 × 77,853.30
  4. Step 4: Simplify right side
    80,963.70x = 9,454,936,837.82
  5. Step 5: Solve for x
    x = 9,454,936,837.82/80,963.70
  6. Step 6: Final answer
    x = 116,779.95

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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.