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Finding the Fourth Proportional to 136.46, 188.32 and 106.99

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Solution

The fourth proportional to 136.46, 188.32 and 106.99 is: 147.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.46 : 188.32 = 106.99 : x
  2. Step 2: Convert to fraction form
    136.46/188.32 = 106.99/x
  3. Step 3: Cross multiply
    136.46x = 188.32 × 106.99
  4. Step 4: Simplify right side
    136.46x = 20,148.09
  5. Step 5: Solve for x
    x = 20,148.09/136.46
  6. Step 6: Final answer
    x = 147.65

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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.