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Finding the Fourth Proportional to 69.77, 96.29 and 40.27

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Solution

The fourth proportional to 69.77, 96.29 and 40.27 is: 55.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.77 : 96.29 = 40.27 : x
  2. Step 2: Convert to fraction form
    69.77/96.29 = 40.27/x
  3. Step 3: Cross multiply
    69.77x = 96.29 × 40.27
  4. Step 4: Simplify right side
    69.77x = 3,877.07
  5. Step 5: Solve for x
    x = 3,877.07/69.77
  6. Step 6: Final answer
    x = 55.57

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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.