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Finding the Fourth Proportional to 114.28, 172.39 and 107.53

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Solution

The fourth proportional to 114.28, 172.39 and 107.53 is: 162.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.28 : 172.39 = 107.53 : x
  2. Step 2: Convert to fraction form
    114.28/172.39 = 107.53/x
  3. Step 3: Cross multiply
    114.28x = 172.39 × 107.53
  4. Step 4: Simplify right side
    114.28x = 18,537.10
  5. Step 5: Solve for x
    x = 18,537.10/114.28
  6. Step 6: Final answer
    x = 162.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.