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Finding the Fourth Proportional to 68.74, 94.98 and 54.30

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Solution

The fourth proportional to 68.74, 94.98 and 54.30 is: 75.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.74 : 94.98 = 54.30 : x
  2. Step 2: Convert to fraction form
    68.74/94.98 = 54.30/x
  3. Step 3: Cross multiply
    68.74x = 94.98 × 54.30
  4. Step 4: Simplify right side
    68.74x = 5,156.94
  5. Step 5: Solve for x
    x = 5,156.94/68.74
  6. Step 6: Final answer
    x = 75.02

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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.