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Finding the Fourth Proportional to 99,218.74, 136,975.17 and 76,507.96

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Solution

The fourth proportional to 99,218.74, 136,975.17 and 76,507.96 is: 105,622.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,218.74 : 136,975.17 = 76,507.96 : x
  2. Step 2: Convert to fraction form
    99,218.74/136,975.17 = 76,507.96/x
  3. Step 3: Cross multiply
    99,218.74x = 136,975.17 × 76,507.96
  4. Step 4: Simplify right side
    99,218.74x = 10,479,690,827.35
  5. Step 5: Solve for x
    x = 10,479,690,827.35/99,218.74
  6. Step 6: Final answer
    x = 105,622.09

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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.