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Finding the Fourth Proportional to 135.02, 202.56 and 66.53

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Solution

The fourth proportional to 135.02, 202.56 and 66.53 is: 99.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.02 : 202.56 = 66.53 : x
  2. Step 2: Convert to fraction form
    135.02/202.56 = 66.53/x
  3. Step 3: Cross multiply
    135.02x = 202.56 × 66.53
  4. Step 4: Simplify right side
    135.02x = 13,475.30
  5. Step 5: Solve for x
    x = 13,475.30/135.02
  6. Step 6: Final answer
    x = 99.81

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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.