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Finding the Fourth Proportional to 118.53, 163.35 and 115.02

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Solution

The fourth proportional to 118.53, 163.35 and 115.02 is: 158.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.53 : 163.35 = 115.02 : x
  2. Step 2: Convert to fraction form
    118.53/163.35 = 115.02/x
  3. Step 3: Cross multiply
    118.53x = 163.35 × 115.02
  4. Step 4: Simplify right side
    118.53x = 18,788.52
  5. Step 5: Solve for x
    x = 18,788.52/118.53
  6. Step 6: Final answer
    x = 158.51

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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.