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Finding the Fourth Proportional to 99.73, 137.61 and 67.04

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Solution

The fourth proportional to 99.73, 137.61 and 67.04 is: 92.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.73 : 137.61 = 67.04 : x
  2. Step 2: Convert to fraction form
    99.73/137.61 = 67.04/x
  3. Step 3: Cross multiply
    99.73x = 137.61 × 67.04
  4. Step 4: Simplify right side
    99.73x = 9,225.37
  5. Step 5: Solve for x
    x = 9,225.37/99.73
  6. Step 6: Final answer
    x = 92.50

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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.