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Finding the Fourth Proportional to 79,694.49, 109,978.71 and 47,863.92

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Solution

The fourth proportional to 79,694.49, 109,978.71 and 47,863.92 is: 66,052.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,694.49 : 109,978.71 = 47,863.92 : x
  2. Step 2: Convert to fraction form
    79,694.49/109,978.71 = 47,863.92/x
  3. Step 3: Cross multiply
    79,694.49x = 109,978.71 × 47,863.92
  4. Step 4: Simplify right side
    79,694.49x = 5,264,012,177.14
  5. Step 5: Solve for x
    x = 5,264,012,177.14/79,694.49
  6. Step 6: Final answer
    x = 66,052.40

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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.