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Finding the Fourth Proportional to 68.17, 93.98 and 49.76

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Solution

The fourth proportional to 68.17, 93.98 and 49.76 is: 68.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.17 : 93.98 = 49.76 : x
  2. Step 2: Convert to fraction form
    68.17/93.98 = 49.76/x
  3. Step 3: Cross multiply
    68.17x = 93.98 × 49.76
  4. Step 4: Simplify right side
    68.17x = 4,676.20
  5. Step 5: Solve for x
    x = 4,676.20/68.17
  6. Step 6: Final answer
    x = 68.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.