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Finding the Fourth Proportional to 141.92, 212.81 and 64.83

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Solution

The fourth proportional to 141.92, 212.81 and 64.83 is: 97.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.92 : 212.81 = 64.83 : x
  2. Step 2: Convert to fraction form
    141.92/212.81 = 64.83/x
  3. Step 3: Cross multiply
    141.92x = 212.81 × 64.83
  4. Step 4: Simplify right side
    141.92x = 13,796.47
  5. Step 5: Solve for x
    x = 13,796.47/141.92
  6. Step 6: Final answer
    x = 97.21

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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.