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Finding the Fourth Proportional to 115.96, 160.02 and 74.50

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Solution

The fourth proportional to 115.96, 160.02 and 74.50 is: 102.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.96 : 160.02 = 74.50 : x
  2. Step 2: Convert to fraction form
    115.96/160.02 = 74.50/x
  3. Step 3: Cross multiply
    115.96x = 160.02 × 74.50
  4. Step 4: Simplify right side
    115.96x = 11,921.49
  5. Step 5: Solve for x
    x = 11,921.49/115.96
  6. Step 6: Final answer
    x = 102.81

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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.