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Finding the Fourth Proportional to 109.43, 151.72 and 106.24

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Solution

The fourth proportional to 109.43, 151.72 and 106.24 is: 147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.43 : 151.72 = 106.24 : x
  2. Step 2: Convert to fraction form
    109.43/151.72 = 106.24/x
  3. Step 3: Cross multiply
    109.43x = 151.72 × 106.24
  4. Step 4: Simplify right side
    109.43x = 16,118.54
  5. Step 5: Solve for x
    x = 16,118.54/109.43
  6. Step 6: Final answer
    x = 147.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.