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Finding the Fourth Proportional to 81.63, 112.91 and 73.04

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Solution

The fourth proportional to 81.63, 112.91 and 73.04 is: 101.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81.63 : 112.91 = 73.04 : x
  2. Step 2: Convert to fraction form
    81.63/112.91 = 73.04/x
  3. Step 3: Cross multiply
    81.63x = 112.91 × 73.04
  4. Step 4: Simplify right side
    81.63x = 8,246.02
  5. Step 5: Solve for x
    x = 8,246.02/81.63
  6. Step 6: Final answer
    x = 101.02

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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.