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Finding the Fourth Proportional to 157.15, 236.67 and 140.18

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Solution

The fourth proportional to 157.15, 236.67 and 140.18 is: 211.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.15 : 236.67 = 140.18 : x
  2. Step 2: Convert to fraction form
    157.15/236.67 = 140.18/x
  3. Step 3: Cross multiply
    157.15x = 236.67 × 140.18
  4. Step 4: Simplify right side
    157.15x = 33,175.70
  5. Step 5: Solve for x
    x = 33,175.70/157.15
  6. Step 6: Final answer
    x = 211.12

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.