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Finding the Fourth Proportional to 157.38, 236.12 and 66.11

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Solution

The fourth proportional to 157.38, 236.12 and 66.11 is: 99.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.38 : 236.12 = 66.11 : x
  2. Step 2: Convert to fraction form
    157.38/236.12 = 66.11/x
  3. Step 3: Cross multiply
    157.38x = 236.12 × 66.11
  4. Step 4: Simplify right side
    157.38x = 15,608.38
  5. Step 5: Solve for x
    x = 15,608.38/157.38
  6. Step 6: Final answer
    x = 99.18

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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.