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Finding the Fourth Proportional to 80,951.70, 121,427.55 and 77,841.30

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Solution

The fourth proportional to 80,951.70, 121,427.55 and 77,841.30 is: 116,761.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,951.70 : 121,427.55 = 77,841.30 : x
  2. Step 2: Convert to fraction form
    80,951.70/121,427.55 = 77,841.30/x
  3. Step 3: Cross multiply
    80,951.70x = 121,427.55 × 77,841.30
  4. Step 4: Simplify right side
    80,951.70x = 9,452,078,347.82
  5. Step 5: Solve for x
    x = 9,452,078,347.82/80,951.70
  6. Step 6: Final answer
    x = 116,761.95

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1.5x scale

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.