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Finding the Fourth Proportional to 146.42, 202.12 and 111.45

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Solution

The fourth proportional to 146.42, 202.12 and 111.45 is: 153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.42 : 202.12 = 111.45 : x
  2. Step 2: Convert to fraction form
    146.42/202.12 = 111.45/x
  3. Step 3: Cross multiply
    146.42x = 202.12 × 111.45
  4. Step 4: Simplify right side
    146.42x = 22,526.27
  5. Step 5: Solve for x
    x = 22,526.27/146.42
  6. Step 6: Final answer
    x = 153.85

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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.