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Finding the Fourth Proportional to 72.84, 108.41 and 72.62

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Solution

The fourth proportional to 72.84, 108.41 and 72.62 is: 108.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.84 : 108.41 = 72.62 : x
  2. Step 2: Convert to fraction form
    72.84/108.41 = 72.62/x
  3. Step 3: Cross multiply
    72.84x = 108.41 × 72.62
  4. Step 4: Simplify right side
    72.84x = 7,871.83
  5. Step 5: Solve for x
    x = 7,871.83/72.84
  6. Step 6: Final answer
    x = 108.07

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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.