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Finding the Fourth Proportional to 112.48, 168.96 and 96.64

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Solution

The fourth proportional to 112.48, 168.96 and 96.64 is: 145.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.48 : 168.96 = 96.64 : x
  2. Step 2: Convert to fraction form
    112.48/168.96 = 96.64/x
  3. Step 3: Cross multiply
    112.48x = 168.96 × 96.64
  4. Step 4: Simplify right side
    112.48x = 16,328.29
  5. Step 5: Solve for x
    x = 16,328.29/112.48
  6. Step 6: Final answer
    x = 145.17

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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.