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Finding the Fourth Proportional to 112.12, 168.09 and 60.70

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Solution

The fourth proportional to 112.12, 168.09 and 60.70 is: 91.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.12 : 168.09 = 60.70 : x
  2. Step 2: Convert to fraction form
    112.12/168.09 = 60.70/x
  3. Step 3: Cross multiply
    112.12x = 168.09 × 60.70
  4. Step 4: Simplify right side
    112.12x = 10,203.06
  5. Step 5: Solve for x
    x = 10,203.06/112.12
  6. Step 6: Final answer
    x = 91.00

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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.