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Finding the Fourth Proportional to 136.31, 204.64 and 100.22

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Solution

The fourth proportional to 136.31, 204.64 and 100.22 is: 150.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.31 : 204.64 = 100.22 : x
  2. Step 2: Convert to fraction form
    136.31/204.64 = 100.22/x
  3. Step 3: Cross multiply
    136.31x = 204.64 × 100.22
  4. Step 4: Simplify right side
    136.31x = 20,507.75
  5. Step 5: Solve for x
    x = 20,507.75/136.31
  6. Step 6: Final answer
    x = 150.45

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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.