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Finding the Fourth Proportional to 74.39, 101.32 and 74.18

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Solution

The fourth proportional to 74.39, 101.32 and 74.18 is: 101.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.39 : 101.32 = 74.18 : x
  2. Step 2: Convert to fraction form
    74.39/101.32 = 74.18/x
  3. Step 3: Cross multiply
    74.39x = 101.32 × 74.18
  4. Step 4: Simplify right side
    74.39x = 7,515.99
  5. Step 5: Solve for x
    x = 7,515.99/74.39
  6. Step 6: Final answer
    x = 101.04

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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.