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Finding the Fourth Proportional to 99,174.80, 136,914.60 and 76,463.96

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Solution

The fourth proportional to 99,174.80, 136,914.60 and 76,463.96 is: 105,561.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,174.80 : 136,914.60 = 76,463.96 : x
  2. Step 2: Convert to fraction form
    99,174.80/136,914.60 = 76,463.96/x
  3. Step 3: Cross multiply
    99,174.80x = 136,914.60 × 76,463.96
  4. Step 4: Simplify right side
    99,174.80x = 10,469,032,497.82
  5. Step 5: Solve for x
    x = 10,469,032,497.82/99,174.80
  6. Step 6: Final answer
    x = 105,561.42

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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.