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Finding the Fourth Proportional to 80,943.96, 121,470.48 and 28,353.90

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Solution

The fourth proportional to 80,943.96, 121,470.48 and 28,353.90 is: 42,549.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,943.96 : 121,470.48 = 28,353.90 : x
  2. Step 2: Convert to fraction form
    80,943.96/121,470.48 = 28,353.90/x
  3. Step 3: Cross multiply
    80,943.96x = 121,470.48 × 28,353.90
  4. Step 4: Simplify right side
    80,943.96x = 3,444,161,842.87
  5. Step 5: Solve for x
    x = 3,444,161,842.87/80,943.96
  6. Step 6: Final answer
    x = 42,549.95

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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.