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Finding the Fourth Proportional to 112.58, 168.93 and 40.45

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Solution

The fourth proportional to 112.58, 168.93 and 40.45 is: 60.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.58 : 168.93 = 40.45 : x
  2. Step 2: Convert to fraction form
    112.58/168.93 = 40.45/x
  3. Step 3: Cross multiply
    112.58x = 168.93 × 40.45
  4. Step 4: Simplify right side
    112.58x = 6,833.22
  5. Step 5: Solve for x
    x = 6,833.22/112.58
  6. Step 6: Final answer
    x = 60.70

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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.