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Finding the Fourth Proportional to 157.44, 235.90 and 111.70

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Solution

The fourth proportional to 157.44, 235.90 and 111.70 is: 167.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.44 : 235.90 = 111.70 : x
  2. Step 2: Convert to fraction form
    157.44/235.90 = 111.70/x
  3. Step 3: Cross multiply
    157.44x = 235.90 × 111.70
  4. Step 4: Simplify right side
    157.44x = 26,350.03
  5. Step 5: Solve for x
    x = 26,350.03/157.44
  6. Step 6: Final answer
    x = 167.37

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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.