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Finding the Fourth Proportional to 146.89, 202.68 and 91.64

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Solution

The fourth proportional to 146.89, 202.68 and 91.64 is: 126.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.89 : 202.68 = 91.64 : x
  2. Step 2: Convert to fraction form
    146.89/202.68 = 91.64/x
  3. Step 3: Cross multiply
    146.89x = 202.68 × 91.64
  4. Step 4: Simplify right side
    146.89x = 18,574.10
  5. Step 5: Solve for x
    x = 18,574.10/146.89
  6. Step 6: Final answer
    x = 126.45

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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.