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Finding the Fourth Proportional to 78,859.92, 108,800.64 and 52,015.80

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Solution

The fourth proportional to 78,859.92, 108,800.64 and 52,015.80 is: 71,764.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.92 : 108,800.64 = 52,015.80 : x
  2. Step 2: Convert to fraction form
    78,859.92/108,800.64 = 52,015.80/x
  3. Step 3: Cross multiply
    78,859.92x = 108,800.64 × 52,015.80
  4. Step 4: Simplify right side
    78,859.92x = 5,659,352,330.11
  5. Step 5: Solve for x
    x = 5,659,352,330.11/78,859.92
  6. Step 6: Final answer
    x = 71,764.62

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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.