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Finding the Fourth Proportional to 134.91, 202.34 and 66.49

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Solution

The fourth proportional to 134.91, 202.34 and 66.49 is: 99.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.91 : 202.34 = 66.49 : x
  2. Step 2: Convert to fraction form
    134.91/202.34 = 66.49/x
  3. Step 3: Cross multiply
    134.91x = 202.34 × 66.49
  4. Step 4: Simplify right side
    134.91x = 13,453.25
  5. Step 5: Solve for x
    x = 13,453.25/134.91
  6. Step 6: Final answer
    x = 99.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.