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Finding the Fourth Proportional to 114.17, 170.31 and 105.56

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Solution

The fourth proportional to 114.17, 170.31 and 105.56 is: 157.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.17 : 170.31 = 105.56 : x
  2. Step 2: Convert to fraction form
    114.17/170.31 = 105.56/x
  3. Step 3: Cross multiply
    114.17x = 170.31 × 105.56
  4. Step 4: Simplify right side
    114.17x = 17,978.65
  5. Step 5: Solve for x
    x = 17,978.65/114.17
  6. Step 6: Final answer
    x = 157.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.