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Finding the Fourth Proportional to 80,951.80, 121,427.70 and 51,427.30

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Solution

The fourth proportional to 80,951.80, 121,427.70 and 51,427.30 is: 77,140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,951.80 : 121,427.70 = 51,427.30 : x
  2. Step 2: Convert to fraction form
    80,951.80/121,427.70 = 51,427.30/x
  3. Step 3: Cross multiply
    80,951.80x = 121,427.70 × 51,427.30
  4. Step 4: Simplify right side
    80,951.80x = 6,244,698,756.21
  5. Step 5: Solve for x
    x = 6,244,698,756.21/80,951.80
  6. Step 6: Final answer
    x = 77,140.95

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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.