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Finding the Fourth Proportional to 107.49, 161.25 and 103.17

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Solution

The fourth proportional to 107.49, 161.25 and 103.17 is: 154.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.49 : 161.25 = 103.17 : x
  2. Step 2: Convert to fraction form
    107.49/161.25 = 103.17/x
  3. Step 3: Cross multiply
    107.49x = 161.25 × 103.17
  4. Step 4: Simplify right side
    107.49x = 16,636.16
  5. Step 5: Solve for x
    x = 16,636.16/107.49
  6. Step 6: Final answer
    x = 154.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.