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Finding the Fourth Proportional to 109.92, 152.28 and 108.36

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Solution

The fourth proportional to 109.92, 152.28 and 108.36 is: 150.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.92 : 152.28 = 108.36 : x
  2. Step 2: Convert to fraction form
    109.92/152.28 = 108.36/x
  3. Step 3: Cross multiply
    109.92x = 152.28 × 108.36
  4. Step 4: Simplify right side
    109.92x = 16,501.06
  5. Step 5: Solve for x
    x = 16,501.06/109.92
  6. Step 6: Final answer
    x = 150.12

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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.