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Finding the Fourth Proportional to 74.01, 110.14 and 71.85

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Solution

The fourth proportional to 74.01, 110.14 and 71.85 is: 106.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.01 : 110.14 = 71.85 : x
  2. Step 2: Convert to fraction form
    74.01/110.14 = 71.85/x
  3. Step 3: Cross multiply
    74.01x = 110.14 × 71.85
  4. Step 4: Simplify right side
    74.01x = 7,913.74
  5. Step 5: Solve for x
    x = 7,913.74/74.01
  6. Step 6: Final answer
    x = 106.93

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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.