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Finding the Fourth Proportional to 170.16, 234.12 and 138.96

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Solution

The fourth proportional to 170.16, 234.12 and 138.96 is: 191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.16 : 234.12 = 138.96 : x
  2. Step 2: Convert to fraction form
    170.16/234.12 = 138.96/x
  3. Step 3: Cross multiply
    170.16x = 234.12 × 138.96
  4. Step 4: Simplify right side
    170.16x = 32,533.32
  5. Step 5: Solve for x
    x = 32,533.32/170.16
  6. Step 6: Final answer
    x = 191.19

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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.