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Finding the Fourth Proportional to 136.66, 188.66 and 93.22

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Solution

The fourth proportional to 136.66, 188.66 and 93.22 is: 128.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.66 : 188.66 = 93.22 : x
  2. Step 2: Convert to fraction form
    136.66/188.66 = 93.22/x
  3. Step 3: Cross multiply
    136.66x = 188.66 × 93.22
  4. Step 4: Simplify right side
    136.66x = 17,586.89
  5. Step 5: Solve for x
    x = 17,586.89/136.66
  6. Step 6: Final answer
    x = 128.69

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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.