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Finding the Fourth Proportional to 73,143.88, 100,909.97 and 42,511.88

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Solution

The fourth proportional to 73,143.88, 100,909.97 and 42,511.88 is: 58,649.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,143.88 : 100,909.97 = 42,511.88 : x
  2. Step 2: Convert to fraction form
    73,143.88/100,909.97 = 42,511.88/x
  3. Step 3: Cross multiply
    73,143.88x = 100,909.97 × 42,511.88
  4. Step 4: Simplify right side
    73,143.88x = 4,289,872,535.44
  5. Step 5: Solve for x
    x = 4,289,872,535.44/73,143.88
  6. Step 6: Final answer
    x = 58,649.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.