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Finding the Fourth Proportional to 79,490.40, 109,694.52 and 43,680.39

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Solution

The fourth proportional to 79,490.40, 109,694.52 and 43,680.39 is: 60,277.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,490.40 : 109,694.52 = 43,680.39 : x
  2. Step 2: Convert to fraction form
    79,490.40/109,694.52 = 43,680.39/x
  3. Step 3: Cross multiply
    79,490.40x = 109,694.52 × 43,680.39
  4. Step 4: Simplify right side
    79,490.40x = 4,791,499,414.46
  5. Step 5: Solve for x
    x = 4,791,499,414.46/79,490.40
  6. Step 6: Final answer
    x = 60,277.71

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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.