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Finding the Fourth Proportional to 94.82, 142.13 and 64.31

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Solution

The fourth proportional to 94.82, 142.13 and 64.31 is: 96.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.82 : 142.13 = 64.31 : x
  2. Step 2: Convert to fraction form
    94.82/142.13 = 64.31/x
  3. Step 3: Cross multiply
    94.82x = 142.13 × 64.31
  4. Step 4: Simplify right side
    94.82x = 9,140.90
  5. Step 5: Solve for x
    x = 9,140.90/94.82
  6. Step 6: Final answer
    x = 96.40

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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.