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Finding the Fourth Proportional to 54.68, 75.36 and 52.11

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Solution

The fourth proportional to 54.68, 75.36 and 52.11 is: 71.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.68 : 75.36 = 52.11 : x
  2. Step 2: Convert to fraction form
    54.68/75.36 = 52.11/x
  3. Step 3: Cross multiply
    54.68x = 75.36 × 52.11
  4. Step 4: Simplify right side
    54.68x = 3,926.75
  5. Step 5: Solve for x
    x = 3,926.75/54.68
  6. Step 6: Final answer
    x = 71.82

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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.