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Finding the Fourth Proportional to 87,299, 120,473.90 and 47,555

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Solution

The fourth proportional to 87,299, 120,473.90 and 47,555 is: 65,626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,299 : 120,473.90 = 47,555 : x
  2. Step 2: Convert to fraction form
    87,299/120,473.90 = 47,555/x
  3. Step 3: Cross multiply
    87,299x = 120,473.90 × 47,555
  4. Step 4: Simplify right side
    87,299x = 5,729,136,314.50
  5. Step 5: Solve for x
    x = 5,729,136,314.50/87,299
  6. Step 6: Final answer
    x = 65,626.60

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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.