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Finding the Fourth Proportional to 107.56, 161.38 and 75.13

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Solution

The fourth proportional to 107.56, 161.38 and 75.13 is: 112.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.56 : 161.38 = 75.13 : x
  2. Step 2: Convert to fraction form
    107.56/161.38 = 75.13/x
  3. Step 3: Cross multiply
    107.56x = 161.38 × 75.13
  4. Step 4: Simplify right side
    107.56x = 12,124.38
  5. Step 5: Solve for x
    x = 12,124.38/107.56
  6. Step 6: Final answer
    x = 112.72

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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.