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Finding the Fourth Proportional to 67,272.84, 100,905.50 and 20,522.04

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Solution

The fourth proportional to 67,272.84, 100,905.50 and 20,522.04 is: 30,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,272.84 : 100,905.50 = 20,522.04 : x
  2. Step 2: Convert to fraction form
    67,272.84/100,905.50 = 20,522.04/x
  3. Step 3: Cross multiply
    67,272.84x = 100,905.50 × 20,522.04
  4. Step 4: Simplify right side
    67,272.84x = 2,070,786,707.22
  5. Step 5: Solve for x
    x = 2,070,786,707.22/67,272.84
  6. Step 6: Final answer
    x = 30,781.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.