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Finding the Fourth Proportional to 75.25, 113.39 and 62.70

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Solution

The fourth proportional to 75.25, 113.39 and 62.70 is: 94.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.25 : 113.39 = 62.70 : x
  2. Step 2: Convert to fraction form
    75.25/113.39 = 62.70/x
  3. Step 3: Cross multiply
    75.25x = 113.39 × 62.70
  4. Step 4: Simplify right side
    75.25x = 7,109.55
  5. Step 5: Solve for x
    x = 7,109.55/75.25
  6. Step 6: Final answer
    x = 94.48

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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.