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Finding the Fourth Proportional to 69.16, 95.46 and 40.07

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Solution

The fourth proportional to 69.16, 95.46 and 40.07 is: 55.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.16 : 95.46 = 40.07 : x
  2. Step 2: Convert to fraction form
    69.16/95.46 = 40.07/x
  3. Step 3: Cross multiply
    69.16x = 95.46 × 40.07
  4. Step 4: Simplify right side
    69.16x = 3,825.08
  5. Step 5: Solve for x
    x = 3,825.08/69.16
  6. Step 6: Final answer
    x = 55.31

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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.