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Finding the Fourth Proportional to 78,806.92, 108,753.54 and 50,512.64

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Solution

The fourth proportional to 78,806.92, 108,753.54 and 50,512.64 is: 69,707.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,806.92 : 108,753.54 = 50,512.64 : x
  2. Step 2: Convert to fraction form
    78,806.92/108,753.54 = 50,512.64/x
  3. Step 3: Cross multiply
    78,806.92x = 108,753.54 × 50,512.64
  4. Step 4: Simplify right side
    78,806.92x = 5,493,428,414.75
  5. Step 5: Solve for x
    x = 5,493,428,414.75/78,806.92
  6. Step 6: Final answer
    x = 69,707.44

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1.5x scale

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.