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Finding the Fourth Proportional to 119,318.57, 178,588.42 and 87,720.27

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Solution

The fourth proportional to 119,318.57, 178,588.42 and 87,720.27 is: 131,294.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,318.57 : 178,588.42 = 87,720.27 : x
  2. Step 2: Convert to fraction form
    119,318.57/178,588.42 = 87,720.27/x
  3. Step 3: Cross multiply
    119,318.57x = 178,588.42 × 87,720.27
  4. Step 4: Simplify right side
    119,318.57x = 15,665,823,089.73
  5. Step 5: Solve for x
    x = 15,665,823,089.73/119,318.57
  6. Step 6: Final answer
    x = 131,294.09

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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.