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Finding the Fourth Proportional to 136.90, 205.12 and 96.12

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Solution

The fourth proportional to 136.90, 205.12 and 96.12 is: 144.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.90 : 205.12 = 96.12 : x
  2. Step 2: Convert to fraction form
    136.90/205.12 = 96.12/x
  3. Step 3: Cross multiply
    136.90x = 205.12 × 96.12
  4. Step 4: Simplify right side
    136.90x = 19,715.71
  5. Step 5: Solve for x
    x = 19,715.71/136.90
  6. Step 6: Final answer
    x = 144.02

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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.