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Finding the Fourth Proportional to 94.77, 142.43 and 71.82

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Solution

The fourth proportional to 94.77, 142.43 and 71.82 is: 107.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.77 : 142.43 = 71.82 : x
  2. Step 2: Convert to fraction form
    94.77/142.43 = 71.82/x
  3. Step 3: Cross multiply
    94.77x = 142.43 × 71.82
  4. Step 4: Simplify right side
    94.77x = 10,228.96
  5. Step 5: Solve for x
    x = 10,228.96/94.77
  6. Step 6: Final answer
    x = 107.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.