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Finding the Fourth Proportional to 135.88, 187.62 and 99.13

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Solution

The fourth proportional to 135.88, 187.62 and 99.13 is: 136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.88 : 187.62 = 99.13 : x
  2. Step 2: Convert to fraction form
    135.88/187.62 = 99.13/x
  3. Step 3: Cross multiply
    135.88x = 187.62 × 99.13
  4. Step 4: Simplify right side
    135.88x = 18,598.77
  5. Step 5: Solve for x
    x = 18,598.77/135.88
  6. Step 6: Final answer
    x = 136.88

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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.