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Finding the Fourth Proportional to 160.49, 240.75 and 69.12

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Solution

The fourth proportional to 160.49, 240.75 and 69.12 is: 103.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.49 : 240.75 = 69.12 : x
  2. Step 2: Convert to fraction form
    160.49/240.75 = 69.12/x
  3. Step 3: Cross multiply
    160.49x = 240.75 × 69.12
  4. Step 4: Simplify right side
    160.49x = 16,640.64
  5. Step 5: Solve for x
    x = 16,640.64/160.49
  6. Step 6: Final answer
    x = 103.69

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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.