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Finding the Fourth Proportional to 67,387.56, 100,999.34 and 47,671.80

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Solution

The fourth proportional to 67,387.56, 100,999.34 and 47,671.80 is: 71,449.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,387.56 : 100,999.34 = 47,671.80 : x
  2. Step 2: Convert to fraction form
    67,387.56/100,999.34 = 47,671.80/x
  3. Step 3: Cross multiply
    67,387.56x = 100,999.34 × 47,671.80
  4. Step 4: Simplify right side
    67,387.56x = 4,814,820,336.61
  5. Step 5: Solve for x
    x = 4,814,820,336.61/67,387.56
  6. Step 6: Final answer
    x = 71,449.69

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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.