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Finding the Fourth Proportional to 79,641.73, 109,880.84 and 45,180.78

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Solution

The fourth proportional to 79,641.73, 109,880.84 and 45,180.78 is: 62,335.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,641.73 : 109,880.84 = 45,180.78 : x
  2. Step 2: Convert to fraction form
    79,641.73/109,880.84 = 45,180.78/x
  3. Step 3: Cross multiply
    79,641.73x = 109,880.84 × 45,180.78
  4. Step 4: Simplify right side
    79,641.73x = 4,964,501,505.01
  5. Step 5: Solve for x
    x = 4,964,501,505.01/79,641.73
  6. Step 6: Final answer
    x = 62,335.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.