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Finding the Fourth Proportional to 67,676, 101,518.80 and 20,922.80

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Solution

The fourth proportional to 67,676, 101,518.80 and 20,922.80 is: 31,385.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,676 : 101,518.80 = 20,922.80 : x
  2. Step 2: Convert to fraction form
    67,676/101,518.80 = 20,922.80/x
  3. Step 3: Cross multiply
    67,676x = 101,518.80 × 20,922.80
  4. Step 4: Simplify right side
    67,676x = 2,124,057,548.64
  5. Step 5: Solve for x
    x = 2,124,057,548.64/67,676
  6. Step 6: Final answer
    x = 31,385.68

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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.