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Finding the Fourth Proportional to 73.14, 100.79 and 54.72

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Solution

The fourth proportional to 73.14, 100.79 and 54.72 is: 75.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.14 : 100.79 = 54.72 : x
  2. Step 2: Convert to fraction form
    73.14/100.79 = 54.72/x
  3. Step 3: Cross multiply
    73.14x = 100.79 × 54.72
  4. Step 4: Simplify right side
    73.14x = 5,515.23
  5. Step 5: Solve for x
    x = 5,515.23/73.14
  6. Step 6: Final answer
    x = 75.41

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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.