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Finding the Fourth Proportional to 170.62, 235.40 and 105.11

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Solution

The fourth proportional to 170.62, 235.40 and 105.11 is: 145.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.62 : 235.40 = 105.11 : x
  2. Step 2: Convert to fraction form
    170.62/235.40 = 105.11/x
  3. Step 3: Cross multiply
    170.62x = 235.40 × 105.11
  4. Step 4: Simplify right side
    170.62x = 24,743.48
  5. Step 5: Solve for x
    x = 24,743.48/170.62
  6. Step 6: Final answer
    x = 145.02

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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.