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Finding the Fourth Proportional to 74.08, 101.72 and 69.08

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Solution

The fourth proportional to 74.08, 101.72 and 69.08 is: 94.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.08 : 101.72 = 69.08 : x
  2. Step 2: Convert to fraction form
    74.08/101.72 = 69.08/x
  3. Step 3: Cross multiply
    74.08x = 101.72 × 69.08
  4. Step 4: Simplify right side
    74.08x = 7,026.82
  5. Step 5: Solve for x
    x = 7,026.82/74.08
  6. Step 6: Final answer
    x = 94.85

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.