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Finding the Fourth Proportional to 67,189.80, 100,749.84 and 19,798.76

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Solution

The fourth proportional to 67,189.80, 100,749.84 and 19,798.76 is: 29,687.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,189.80 : 100,749.84 = 19,798.76 : x
  2. Step 2: Convert to fraction form
    67,189.80/100,749.84 = 19,798.76/x
  3. Step 3: Cross multiply
    67,189.80x = 100,749.84 × 19,798.76
  4. Step 4: Simplify right side
    67,189.80x = 1,994,721,902.20
  5. Step 5: Solve for x
    x = 1,994,721,902.20/67,189.80
  6. Step 6: Final answer
    x = 29,687.87

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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.