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Finding the Fourth Proportional to 78,753.28, 108,698.88 and 60,820.96

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Solution

The fourth proportional to 78,753.28, 108,698.88 and 60,820.96 is: 83,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,753.28 : 108,698.88 = 60,820.96 : x
  2. Step 2: Convert to fraction form
    78,753.28/108,698.88 = 60,820.96/x
  3. Step 3: Cross multiply
    78,753.28x = 108,698.88 × 60,820.96
  4. Step 4: Simplify right side
    78,753.28x = 6,611,170,232.52
  5. Step 5: Solve for x
    x = 6,611,170,232.52/78,753.28
  6. Step 6: Final answer
    x = 83,947.87

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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.