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Finding the Fourth Proportional to 112.04, 154.61 and 72.68

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Solution

The fourth proportional to 112.04, 154.61 and 72.68 is: 100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.04 : 154.61 = 72.68 : x
  2. Step 2: Convert to fraction form
    112.04/154.61 = 72.68/x
  3. Step 3: Cross multiply
    112.04x = 154.61 × 72.68
  4. Step 4: Simplify right side
    112.04x = 11,237.05
  5. Step 5: Solve for x
    x = 11,237.05/112.04
  6. Step 6: Final answer
    x = 100.30

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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.