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Finding the Fourth Proportional to 67,808, 101,712.02 and 21,060.88

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Solution

The fourth proportional to 67,808, 101,712.02 and 21,060.88 is: 31,591.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,808 : 101,712.02 = 21,060.88 : x
  2. Step 2: Convert to fraction form
    67,808/101,712.02 = 21,060.88/x
  3. Step 3: Cross multiply
    67,808x = 101,712.02 × 21,060.88
  4. Step 4: Simplify right side
    67,808x = 2,142,144,647.78
  5. Step 5: Solve for x
    x = 2,142,144,647.78/67,808
  6. Step 6: Final answer
    x = 31,591.33

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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.