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Finding the Fourth Proportional to 170.40, 235.15 and 96.71

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Solution

The fourth proportional to 170.40, 235.15 and 96.71 is: 133.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.40 : 235.15 = 96.71 : x
  2. Step 2: Convert to fraction form
    170.40/235.15 = 96.71/x
  3. Step 3: Cross multiply
    170.40x = 235.15 × 96.71
  4. Step 4: Simplify right side
    170.40x = 22,739.70
  5. Step 5: Solve for x
    x = 22,739.70/170.40
  6. Step 6: Final answer
    x = 133.45

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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.