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Finding the Fourth Proportional to 114.47, 170.85 and 111.74

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Solution

The fourth proportional to 114.47, 170.85 and 111.74 is: 166.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.47 : 170.85 = 111.74 : x
  2. Step 2: Convert to fraction form
    114.47/170.85 = 111.74/x
  3. Step 3: Cross multiply
    114.47x = 170.85 × 111.74
  4. Step 4: Simplify right side
    114.47x = 19,090.78
  5. Step 5: Solve for x
    x = 19,090.78/114.47
  6. Step 6: Final answer
    x = 166.78

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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.