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Finding the Fourth Proportional to 79,287.78, 109,474.54 and 51,042.68

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Solution

The fourth proportional to 79,287.78, 109,474.54 and 51,042.68 is: 70,475.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,287.78 : 109,474.54 = 51,042.68 : x
  2. Step 2: Convert to fraction form
    79,287.78/109,474.54 = 51,042.68/x
  3. Step 3: Cross multiply
    79,287.78x = 109,474.54 × 51,042.68
  4. Step 4: Simplify right side
    79,287.78x = 5,587,873,913.37
  5. Step 5: Solve for x
    x = 5,587,873,913.37/79,287.78
  6. Step 6: Final answer
    x = 70,475.85

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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.