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Finding the Fourth Proportional to 136.93, 205.05 and 91.14

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Solution

The fourth proportional to 136.93, 205.05 and 91.14 is: 136.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.93 : 205.05 = 91.14 : x
  2. Step 2: Convert to fraction form
    136.93/205.05 = 91.14/x
  3. Step 3: Cross multiply
    136.93x = 205.05 × 91.14
  4. Step 4: Simplify right side
    136.93x = 18,688.26
  5. Step 5: Solve for x
    x = 18,688.26/136.93
  6. Step 6: Final answer
    x = 136.48

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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.