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Finding the Fourth Proportional to 78,695.28, 108,618.84 and 60,762.96

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Solution

The fourth proportional to 78,695.28, 108,618.84 and 60,762.96 is: 83,867.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.28 : 108,618.84 = 60,762.96 : x
  2. Step 2: Convert to fraction form
    78,695.28/108,618.84 = 60,762.96/x
  3. Step 3: Cross multiply
    78,695.28x = 108,618.84 × 60,762.96
  4. Step 4: Simplify right side
    78,695.28x = 6,600,002,230.17
  5. Step 5: Solve for x
    x = 6,600,002,230.17/78,695.28
  6. Step 6: Final answer
    x = 83,867.83

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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.