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Finding the Fourth Proportional to 73.64, 110.20 and 54.36

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Solution

The fourth proportional to 73.64, 110.20 and 54.36 is: 81.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.64 : 110.20 = 54.36 : x
  2. Step 2: Convert to fraction form
    73.64/110.20 = 54.36/x
  3. Step 3: Cross multiply
    73.64x = 110.20 × 54.36
  4. Step 4: Simplify right side
    73.64x = 5,990.47
  5. Step 5: Solve for x
    x = 5,990.47/73.64
  6. Step 6: Final answer
    x = 81.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.