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Finding the Fourth Proportional to 67,191.80, 100,752.84 and 19,800.76

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Solution

The fourth proportional to 67,191.80, 100,752.84 and 19,800.76 is: 29,690.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,191.80 : 100,752.84 = 19,800.76 : x
  2. Step 2: Convert to fraction form
    67,191.80/100,752.84 = 19,800.76/x
  3. Step 3: Cross multiply
    67,191.80x = 100,752.84 × 19,800.76
  4. Step 4: Simplify right side
    67,191.80x = 1,994,982,804.16
  5. Step 5: Solve for x
    x = 1,994,982,804.16/67,191.80
  6. Step 6: Final answer
    x = 29,690.87

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1.5x scale

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.