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Finding the Fourth Proportional to 134.95, 202.31 and 66.48

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Solution

The fourth proportional to 134.95, 202.31 and 66.48 is: 99.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.95 : 202.31 = 66.48 : x
  2. Step 2: Convert to fraction form
    134.95/202.31 = 66.48/x
  3. Step 3: Cross multiply
    134.95x = 202.31 × 66.48
  4. Step 4: Simplify right side
    134.95x = 13,449.57
  5. Step 5: Solve for x
    x = 13,449.57/134.95
  6. Step 6: Final answer
    x = 99.66

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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.