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Finding the Fourth Proportional to 74.16, 101.04 and 73.92

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Solution

The fourth proportional to 74.16, 101.04 and 73.92 is: 100.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.16 : 101.04 = 73.92 : x
  2. Step 2: Convert to fraction form
    74.16/101.04 = 73.92/x
  3. Step 3: Cross multiply
    74.16x = 101.04 × 73.92
  4. Step 4: Simplify right side
    74.16x = 7,468.88
  5. Step 5: Solve for x
    x = 7,468.88/74.16
  6. Step 6: Final answer
    x = 100.71

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.