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Finding the Fourth Proportional to 170.60, 235.33 and 129.31

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Solution

The fourth proportional to 170.60, 235.33 and 129.31 is: 178.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.60 : 235.33 = 129.31 : x
  2. Step 2: Convert to fraction form
    170.60/235.33 = 129.31/x
  3. Step 3: Cross multiply
    170.60x = 235.33 × 129.31
  4. Step 4: Simplify right side
    170.60x = 30,430.93
  5. Step 5: Solve for x
    x = 30,430.93/170.60
  6. Step 6: Final answer
    x = 178.38

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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.