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Finding the Fourth Proportional to 157.95, 218.07 and 108.32

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Solution

The fourth proportional to 157.95, 218.07 and 108.32 is: 149.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.95 : 218.07 = 108.32 : x
  2. Step 2: Convert to fraction form
    157.95/218.07 = 108.32/x
  3. Step 3: Cross multiply
    157.95x = 218.07 × 108.32
  4. Step 4: Simplify right side
    157.95x = 23,620.25
  5. Step 5: Solve for x
    x = 23,620.25/157.95
  6. Step 6: Final answer
    x = 149.54

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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.