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Finding the Fourth Proportional to 69.59, 96.05 and 40.48

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Solution

The fourth proportional to 69.59, 96.05 and 40.48 is: 55.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.59 : 96.05 = 40.48 : x
  2. Step 2: Convert to fraction form
    69.59/96.05 = 40.48/x
  3. Step 3: Cross multiply
    69.59x = 96.05 × 40.48
  4. Step 4: Simplify right side
    69.59x = 3,887.66
  5. Step 5: Solve for x
    x = 3,887.66/69.59
  6. Step 6: Final answer
    x = 55.86

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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.