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Finding the Fourth Proportional to 135.18, 202.86 and 74.34

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Solution

The fourth proportional to 135.18, 202.86 and 74.34 is: 111.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.18 : 202.86 = 74.34 : x
  2. Step 2: Convert to fraction form
    135.18/202.86 = 74.34/x
  3. Step 3: Cross multiply
    135.18x = 202.86 × 74.34
  4. Step 4: Simplify right side
    135.18x = 15,080.61
  5. Step 5: Solve for x
    x = 15,080.61/135.18
  6. Step 6: Final answer
    x = 111.56

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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.