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Finding the Fourth Proportional to 75.63, 112.83 and 61.95

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Solution

The fourth proportional to 75.63, 112.83 and 61.95 is: 92.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.63 : 112.83 = 61.95 : x
  2. Step 2: Convert to fraction form
    75.63/112.83 = 61.95/x
  3. Step 3: Cross multiply
    75.63x = 112.83 × 61.95
  4. Step 4: Simplify right side
    75.63x = 6,989.82
  5. Step 5: Solve for x
    x = 6,989.82/75.63
  6. Step 6: Final answer
    x = 92.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.