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Finding the Fourth Proportional to 55.44, 76.50 and 39.12

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Solution

The fourth proportional to 55.44, 76.50 and 39.12 is: 53.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.44 : 76.50 = 39.12 : x
  2. Step 2: Convert to fraction form
    55.44/76.50 = 39.12/x
  3. Step 3: Cross multiply
    55.44x = 76.50 × 39.12
  4. Step 4: Simplify right side
    55.44x = 2,992.68
  5. Step 5: Solve for x
    x = 2,992.68/55.44
  6. Step 6: Final answer
    x = 53.98

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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.