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Finding the Fourth Proportional to 170.50, 235.28 and 108.31

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Solution

The fourth proportional to 170.50, 235.28 and 108.31 is: 149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.50 : 235.28 = 108.31 : x
  2. Step 2: Convert to fraction form
    170.50/235.28 = 108.31/x
  3. Step 3: Cross multiply
    170.50x = 235.28 × 108.31
  4. Step 4: Simplify right side
    170.50x = 25,483.18
  5. Step 5: Solve for x
    x = 25,483.18/170.50
  6. Step 6: Final answer
    x = 149.46

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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.