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Finding the Fourth Proportional to 136.19, 204.31 and 49.52

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Solution

The fourth proportional to 136.19, 204.31 and 49.52 is: 74.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.19 : 204.31 = 49.52 : x
  2. Step 2: Convert to fraction form
    136.19/204.31 = 49.52/x
  3. Step 3: Cross multiply
    136.19x = 204.31 × 49.52
  4. Step 4: Simplify right side
    136.19x = 10,117.43
  5. Step 5: Solve for x
    x = 10,117.43/136.19
  6. Step 6: Final answer
    x = 74.29

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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.