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Finding the Fourth Proportional to 107.37, 160.92 and 43.20

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Solution

The fourth proportional to 107.37, 160.92 and 43.20 is: 64.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.37 : 160.92 = 43.20 : x
  2. Step 2: Convert to fraction form
    107.37/160.92 = 43.20/x
  3. Step 3: Cross multiply
    107.37x = 160.92 × 43.20
  4. Step 4: Simplify right side
    107.37x = 6,951.74
  5. Step 5: Solve for x
    x = 6,951.74/107.37
  6. Step 6: Final answer
    x = 64.75

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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.