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Finding the Fourth Proportional to 170.89, 235.78 and 108.72

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Solution

The fourth proportional to 170.89, 235.78 and 108.72 is: 150.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.89 : 235.78 = 108.72 : x
  2. Step 2: Convert to fraction form
    170.89/235.78 = 108.72/x
  3. Step 3: Cross multiply
    170.89x = 235.78 × 108.72
  4. Step 4: Simplify right side
    170.89x = 25,634.00
  5. Step 5: Solve for x
    x = 25,634.00/170.89
  6. Step 6: Final answer
    x = 150.00

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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.