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Finding the Fourth Proportional to 42.12, 58.08 and 27.54

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Solution

The fourth proportional to 42.12, 58.08 and 27.54 is: 37.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.12 : 58.08 = 27.54 : x
  2. Step 2: Convert to fraction form
    42.12/58.08 = 27.54/x
  3. Step 3: Cross multiply
    42.12x = 58.08 × 27.54
  4. Step 4: Simplify right side
    42.12x = 1,599.52
  5. Step 5: Solve for x
    x = 1,599.52/42.12
  6. Step 6: Final answer
    x = 37.98

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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.