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Finding the Fourth Proportional to 80,863.70, 121,263.15 and 28,246.10

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Solution

The fourth proportional to 80,863.70, 121,263.15 and 28,246.10 is: 42,357.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.70 : 121,263.15 = 28,246.10 : x
  2. Step 2: Convert to fraction form
    80,863.70/121,263.15 = 28,246.10/x
  3. Step 3: Cross multiply
    80,863.70x = 121,263.15 × 28,246.10
  4. Step 4: Simplify right side
    80,863.70x = 3,425,211,061.22
  5. Step 5: Solve for x
    x = 3,425,211,061.22/80,863.70
  6. Step 6: Final answer
    x = 42,357.83

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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.