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Finding the Fourth Proportional to 170.54, 235.42 and 115.45

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Solution

The fourth proportional to 170.54, 235.42 and 115.45 is: 159.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.54 : 235.42 = 115.45 : x
  2. Step 2: Convert to fraction form
    170.54/235.42 = 115.45/x
  3. Step 3: Cross multiply
    170.54x = 235.42 × 115.45
  4. Step 4: Simplify right side
    170.54x = 27,179.01
  5. Step 5: Solve for x
    x = 27,179.01/170.54
  6. Step 6: Final answer
    x = 159.37

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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.