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Finding the Fourth Proportional to 68.44, 94.57 and 53.72

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Solution

The fourth proportional to 68.44, 94.57 and 53.72 is: 74.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.44 : 94.57 = 53.72 : x
  2. Step 2: Convert to fraction form
    68.44/94.57 = 53.72/x
  3. Step 3: Cross multiply
    68.44x = 94.57 × 53.72
  4. Step 4: Simplify right side
    68.44x = 5,080.30
  5. Step 5: Solve for x
    x = 5,080.30/68.44
  6. Step 6: Final answer
    x = 74.23

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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.