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Finding the Fourth Proportional to 119,241.72, 178,473.17 and 87,643.42

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Solution

The fourth proportional to 119,241.72, 178,473.17 and 87,643.42 is: 131,178.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,241.72 : 178,473.17 = 87,643.42 : x
  2. Step 2: Convert to fraction form
    119,241.72/178,473.17 = 87,643.42/x
  3. Step 3: Cross multiply
    119,241.72x = 178,473.17 × 87,643.42
  4. Step 4: Simplify right side
    119,241.72x = 15,641,998,769.97
  5. Step 5: Solve for x
    x = 15,641,998,769.97/119,241.72
  6. Step 6: Final answer
    x = 131,178.91

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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.