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Finding the Fourth Proportional to 68.35, 102.40 and 32.31

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Solution

The fourth proportional to 68.35, 102.40 and 32.31 is: 48.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.35 : 102.40 = 32.31 : x
  2. Step 2: Convert to fraction form
    68.35/102.40 = 32.31/x
  3. Step 3: Cross multiply
    68.35x = 102.40 × 32.31
  4. Step 4: Simplify right side
    68.35x = 3,308.54
  5. Step 5: Solve for x
    x = 3,308.54/68.35
  6. Step 6: Final answer
    x = 48.41

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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.