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Finding the Fourth Proportional to 73.07, 100.75 and 63.20

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Solution

The fourth proportional to 73.07, 100.75 and 63.20 is: 87.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.07 : 100.75 = 63.20 : x
  2. Step 2: Convert to fraction form
    73.07/100.75 = 63.20/x
  3. Step 3: Cross multiply
    73.07x = 100.75 × 63.20
  4. Step 4: Simplify right side
    73.07x = 6,367.49
  5. Step 5: Solve for x
    x = 6,367.49/73.07
  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.