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Finding the Fourth Proportional to 56.14, 77.49 and 55.42

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Solution

The fourth proportional to 56.14, 77.49 and 55.42 is: 76.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.14 : 77.49 = 55.42 : x
  2. Step 2: Convert to fraction form
    56.14/77.49 = 55.42/x
  3. Step 3: Cross multiply
    56.14x = 77.49 × 55.42
  4. Step 4: Simplify right side
    56.14x = 4,294.50
  5. Step 5: Solve for x
    x = 4,294.50/56.14
  6. Step 6: Final answer
    x = 76.50

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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.