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Finding the Fourth Proportional to 42,861.99, 64,308.11 and 19,167.33

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Solution

The fourth proportional to 42,861.99, 64,308.11 and 19,167.33 is: 28,757.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,861.99 : 64,308.11 = 19,167.33 : x
  2. Step 2: Convert to fraction form
    42,861.99/64,308.11 = 19,167.33/x
  3. Step 3: Cross multiply
    42,861.99x = 64,308.11 × 19,167.33
  4. Step 4: Simplify right side
    42,861.99x = 1,232,614,766.05
  5. Step 5: Solve for x
    x = 1,232,614,766.05/42,861.99
  6. Step 6: Final answer
    x = 28,757.76

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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.