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Finding the Fourth Proportional to 170.67, 235.83 and 129.15

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Solution

The fourth proportional to 170.67, 235.83 and 129.15 is: 178.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.67 : 235.83 = 129.15 : x
  2. Step 2: Convert to fraction form
    170.67/235.83 = 129.15/x
  3. Step 3: Cross multiply
    170.67x = 235.83 × 129.15
  4. Step 4: Simplify right side
    170.67x = 30,457.93
  5. Step 5: Solve for x
    x = 30,457.93/170.67
  6. Step 6: Final answer
    x = 178.46

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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.