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Finding the Fourth Proportional to 75.24, 112.22 and 74.03

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Solution

The fourth proportional to 75.24, 112.22 and 74.03 is: 110.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.24 : 112.22 = 74.03 : x
  2. Step 2: Convert to fraction form
    75.24/112.22 = 74.03/x
  3. Step 3: Cross multiply
    75.24x = 112.22 × 74.03
  4. Step 4: Simplify right side
    75.24x = 8,307.65
  5. Step 5: Solve for x
    x = 8,307.65/75.24
  6. Step 6: Final answer
    x = 110.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.