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Finding the Fourth Proportional to 135.95, 187.34 and 99.09

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Solution

The fourth proportional to 135.95, 187.34 and 99.09 is: 136.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.95 : 187.34 = 99.09 : x
  2. Step 2: Convert to fraction form
    135.95/187.34 = 99.09/x
  3. Step 3: Cross multiply
    135.95x = 187.34 × 99.09
  4. Step 4: Simplify right side
    135.95x = 18,563.03
  5. Step 5: Solve for x
    x = 18,563.03/135.95
  6. Step 6: Final answer
    x = 136.55

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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.