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Finding the Fourth Proportional to 80,718.57, 121,076.64 and 36,313.97

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Solution

The fourth proportional to 80,718.57, 121,076.64 and 36,313.97 is: 54,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,718.57 : 121,076.64 = 36,313.97 : x
  2. Step 2: Convert to fraction form
    80,718.57/121,076.64 = 36,313.97/x
  3. Step 3: Cross multiply
    80,718.57x = 121,076.64 × 36,313.97
  4. Step 4: Simplify right side
    80,718.57x = 4,396,772,867.28
  5. Step 5: Solve for x
    x = 4,396,772,867.28/80,718.57
  6. Step 6: Final answer
    x = 54,470.40

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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.