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Finding the Fourth Proportional to 136.35, 187.99 and 99.06

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Solution

The fourth proportional to 136.35, 187.99 and 99.06 is: 136.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.35 : 187.99 = 99.06 : x
  2. Step 2: Convert to fraction form
    136.35/187.99 = 99.06/x
  3. Step 3: Cross multiply
    136.35x = 187.99 × 99.06
  4. Step 4: Simplify right side
    136.35x = 18,622.29
  5. Step 5: Solve for x
    x = 18,622.29/136.35
  6. Step 6: Final answer
    x = 136.58

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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.