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Finding the Fourth Proportional to 75.74, 114.21 and 69.26

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Solution

The fourth proportional to 75.74, 114.21 and 69.26 is: 104.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.74 : 114.21 = 69.26 : x
  2. Step 2: Convert to fraction form
    75.74/114.21 = 69.26/x
  3. Step 3: Cross multiply
    75.74x = 114.21 × 69.26
  4. Step 4: Simplify right side
    75.74x = 7,909.61
  5. Step 5: Solve for x
    x = 7,909.61/75.74
  6. Step 6: Final answer
    x = 104.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.