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Finding the Fourth Proportional to 146.61, 201.89 and 113.81

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Solution

The fourth proportional to 146.61, 201.89 and 113.81 is: 156.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.61 : 201.89 = 113.81 : x
  2. Step 2: Convert to fraction form
    146.61/201.89 = 113.81/x
  3. Step 3: Cross multiply
    146.61x = 201.89 × 113.81
  4. Step 4: Simplify right side
    146.61x = 22,976.38
  5. Step 5: Solve for x
    x = 22,976.38/146.61
  6. Step 6: Final answer
    x = 156.72

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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.