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Finding the Fourth Proportional to 79,691.68, 109,937.58 and 51,406.48

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Solution

The fourth proportional to 79,691.68, 109,937.58 and 51,406.48 is: 70,917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,691.68 : 109,937.58 = 51,406.48 : x
  2. Step 2: Convert to fraction form
    79,691.68/109,937.58 = 51,406.48/x
  3. Step 3: Cross multiply
    79,691.68x = 109,937.58 × 51,406.48
  4. Step 4: Simplify right side
    79,691.68x = 5,651,504,007.52
  5. Step 5: Solve for x
    x = 5,651,504,007.52/79,691.68
  6. Step 6: Final answer
    x = 70,917.11

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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.