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Finding the Fourth Proportional to 67,238.99, 100,869.42 and 19,858.87

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Solution

The fourth proportional to 67,238.99, 100,869.42 and 19,858.87 is: 29,791.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,238.99 : 100,869.42 = 19,858.87 : x
  2. Step 2: Convert to fraction form
    67,238.99/100,869.42 = 19,858.87/x
  3. Step 3: Cross multiply
    67,238.99x = 100,869.42 × 19,858.87
  4. Step 4: Simplify right side
    67,238.99x = 2,003,152,698.76
  5. Step 5: Solve for x
    x = 2,003,152,698.76/67,238.99
  6. Step 6: Final answer
    x = 29,791.53

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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.