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Finding the Fourth Proportional to 76,558.60, 114,513.90 and 68,717.80

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Solution

The fourth proportional to 76,558.60, 114,513.90 and 68,717.80 is: 102,785.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,558.60 : 114,513.90 = 68,717.80 : x
  2. Step 2: Convert to fraction form
    76,558.60/114,513.90 = 68,717.80/x
  3. Step 3: Cross multiply
    76,558.60x = 114,513.90 × 68,717.80
  4. Step 4: Simplify right side
    76,558.60x = 7,869,143,277.42
  5. Step 5: Solve for x
    x = 7,869,143,277.42/76,558.60
  6. Step 6: Final answer
    x = 102,785.88

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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.