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Finding the Fourth Proportional to 94.89, 142.07 and 64.39

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Solution

The fourth proportional to 94.89, 142.07 and 64.39 is: 96.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.89 : 142.07 = 64.39 : x
  2. Step 2: Convert to fraction form
    94.89/142.07 = 64.39/x
  3. Step 3: Cross multiply
    94.89x = 142.07 × 64.39
  4. Step 4: Simplify right side
    94.89x = 9,147.89
  5. Step 5: Solve for x
    x = 9,147.89/94.89
  6. Step 6: Final answer
    x = 96.41

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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.