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Finding the Fourth Proportional to 112.66, 169.04 and 40.53

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Solution

The fourth proportional to 112.66, 169.04 and 40.53 is: 60.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.66 : 169.04 = 40.53 : x
  2. Step 2: Convert to fraction form
    112.66/169.04 = 40.53/x
  3. Step 3: Cross multiply
    112.66x = 169.04 × 40.53
  4. Step 4: Simplify right side
    112.66x = 6,851.19
  5. Step 5: Solve for x
    x = 6,851.19/112.66
  6. Step 6: Final answer
    x = 60.81

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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.