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Finding the Fourth Proportional to 68.63, 103.31 and 48.48

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Solution

The fourth proportional to 68.63, 103.31 and 48.48 is: 72.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.63 : 103.31 = 48.48 : x
  2. Step 2: Convert to fraction form
    68.63/103.31 = 48.48/x
  3. Step 3: Cross multiply
    68.63x = 103.31 × 48.48
  4. Step 4: Simplify right side
    68.63x = 5,008.47
  5. Step 5: Solve for x
    x = 5,008.47/68.63
  6. Step 6: Final answer
    x = 72.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.