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Finding the Fourth Proportional to 112.87, 156.13 and 94.42

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Solution

The fourth proportional to 112.87, 156.13 and 94.42 is: 130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.87 : 156.13 = 94.42 : x
  2. Step 2: Convert to fraction form
    112.87/156.13 = 94.42/x
  3. Step 3: Cross multiply
    112.87x = 156.13 × 94.42
  4. Step 4: Simplify right side
    112.87x = 14,740.88
  5. Step 5: Solve for x
    x = 14,740.88/112.87
  6. Step 6: Final answer
    x = 130.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.