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Finding the Fourth Proportional to 114.35, 170.68 and 105.20

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Solution

The fourth proportional to 114.35, 170.68 and 105.20 is: 157.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.35 : 170.68 = 105.20 : x
  2. Step 2: Convert to fraction form
    114.35/170.68 = 105.20/x
  3. Step 3: Cross multiply
    114.35x = 170.68 × 105.20
  4. Step 4: Simplify right side
    114.35x = 17,954.16
  5. Step 5: Solve for x
    x = 17,954.16/114.35
  6. Step 6: Final answer
    x = 157.02

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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.