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Finding the Fourth Proportional to 67,076.65, 100,472.81 and 45,917.42

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Solution

The fourth proportional to 67,076.65, 100,472.81 and 45,917.42 is: 68,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,076.65 : 100,472.81 = 45,917.42 : x
  2. Step 2: Convert to fraction form
    67,076.65/100,472.81 = 45,917.42/x
  3. Step 3: Cross multiply
    67,076.65x = 100,472.81 × 45,917.42
  4. Step 4: Simplify right side
    67,076.65x = 4,613,451,985.76
  5. Step 5: Solve for x
    x = 4,613,451,985.76/67,076.65
  6. Step 6: Final answer
    x = 68,778.81

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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.