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Finding the Fourth Proportional to 76,560.60, 114,516.90 and 68,719.80

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Solution

The fourth proportional to 76,560.60, 114,516.90 and 68,719.80 is: 102,788.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,560.60 : 114,516.90 = 68,719.80 : x
  2. Step 2: Convert to fraction form
    76,560.60/114,516.90 = 68,719.80/x
  3. Step 3: Cross multiply
    76,560.60x = 114,516.90 × 68,719.80
  4. Step 4: Simplify right side
    76,560.60x = 7,869,578,464.62
  5. Step 5: Solve for x
    x = 7,869,578,464.62/76,560.60
  6. Step 6: Final answer
    x = 102,788.88

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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.