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Finding the Fourth Proportional to 165.19, 247.30 and 107.25

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Solution

The fourth proportional to 165.19, 247.30 and 107.25 is: 160.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.19 : 247.30 = 107.25 : x
  2. Step 2: Convert to fraction form
    165.19/247.30 = 107.25/x
  3. Step 3: Cross multiply
    165.19x = 247.30 × 107.25
  4. Step 4: Simplify right side
    165.19x = 26,522.93
  5. Step 5: Solve for x
    x = 26,522.93/165.19
  6. Step 6: Final answer
    x = 160.56

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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.