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Finding the Fourth Proportional to 74.44, 102.69 and 51.15

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Solution

The fourth proportional to 74.44, 102.69 and 51.15 is: 70.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.44 : 102.69 = 51.15 : x
  2. Step 2: Convert to fraction form
    74.44/102.69 = 51.15/x
  3. Step 3: Cross multiply
    74.44x = 102.69 × 51.15
  4. Step 4: Simplify right side
    74.44x = 5,252.59
  5. Step 5: Solve for x
    x = 5,252.59/74.44
  6. Step 6: Final answer
    x = 70.56

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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.