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Finding the Fourth Proportional to 75.75, 104.36 and 63.51

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Solution

The fourth proportional to 75.75, 104.36 and 63.51 is: 87.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.75 : 104.36 = 63.51 : x
  2. Step 2: Convert to fraction form
    75.75/104.36 = 63.51/x
  3. Step 3: Cross multiply
    75.75x = 104.36 × 63.51
  4. Step 4: Simplify right side
    75.75x = 6,627.59
  5. Step 5: Solve for x
    x = 6,627.59/75.75
  6. Step 6: Final answer
    x = 87.49

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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.