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Finding the Fourth Proportional to 74.15, 111.24 and 51.37

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Solution

The fourth proportional to 74.15, 111.24 and 51.37 is: 77.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.15 : 111.24 = 51.37 : x
  2. Step 2: Convert to fraction form
    74.15/111.24 = 51.37/x
  3. Step 3: Cross multiply
    74.15x = 111.24 × 51.37
  4. Step 4: Simplify right side
    74.15x = 5,714.12
  5. Step 5: Solve for x
    x = 5,714.12/74.15
  6. Step 6: Final answer
    x = 77.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.