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Finding the Fourth Proportional to 78,517.68, 117,504.36 and 75,251.76

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Solution

The fourth proportional to 78,517.68, 117,504.36 and 75,251.76 is: 112,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,517.68 : 117,504.36 = 75,251.76 : x
  2. Step 2: Convert to fraction form
    78,517.68/117,504.36 = 75,251.76/x
  3. Step 3: Cross multiply
    78,517.68x = 117,504.36 × 75,251.76
  4. Step 4: Simplify right side
    78,517.68x = 8,842,409,897.67
  5. Step 5: Solve for x
    x = 8,842,409,897.67/78,517.68
  6. Step 6: Final answer
    x = 112,616.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.