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Finding the Fourth Proportional to 54.85, 75.67 and 31.52

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Solution

The fourth proportional to 54.85, 75.67 and 31.52 is: 43.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.85 : 75.67 = 31.52 : x
  2. Step 2: Convert to fraction form
    54.85/75.67 = 31.52/x
  3. Step 3: Cross multiply
    54.85x = 75.67 × 31.52
  4. Step 4: Simplify right side
    54.85x = 2,385.23
  5. Step 5: Solve for x
    x = 2,385.23/54.85
  6. Step 6: Final answer
    x = 43.49

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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.