Home / 78,969.15-108,906.68-52,138.76

Finding the Fourth Proportional to 78,969.15, 108,906.68 and 52,138.76

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Solution

The fourth proportional to 78,969.15, 108,906.68 and 52,138.76 is: 71,904.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,969.15 : 108,906.68 = 52,138.76 : x
  2. Step 2: Convert to fraction form
    78,969.15/108,906.68 = 52,138.76/x
  3. Step 3: Cross multiply
    78,969.15x = 108,906.68 × 52,138.76
  4. Step 4: Simplify right side
    78,969.15x = 5,678,259,462.35
  5. Step 5: Solve for x
    x = 5,678,259,462.35/78,969.15
  6. Step 6: Final answer
    x = 71,904.78

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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.