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Finding the Fourth Proportional to 73.62, 101.49 and 63.21

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Solution

The fourth proportional to 73.62, 101.49 and 63.21 is: 87.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.62 : 101.49 = 63.21 : x
  2. Step 2: Convert to fraction form
    73.62/101.49 = 63.21/x
  3. Step 3: Cross multiply
    73.62x = 101.49 × 63.21
  4. Step 4: Simplify right side
    73.62x = 6,415.18
  5. Step 5: Solve for x
    x = 6,415.18/73.62
  6. Step 6: Final answer
    x = 87.14

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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.