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Finding the Fourth Proportional to 107.27, 160.71 and 72.49

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Solution

The fourth proportional to 107.27, 160.71 and 72.49 is: 108.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.27 : 160.71 = 72.49 : x
  2. Step 2: Convert to fraction form
    107.27/160.71 = 72.49/x
  3. Step 3: Cross multiply
    107.27x = 160.71 × 72.49
  4. Step 4: Simplify right side
    107.27x = 11,649.51
  5. Step 5: Solve for x
    x = 11,649.51/107.27
  6. Step 6: Final answer
    x = 108.60

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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.