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Finding the Fourth Proportional to 87,139.41, 119,469.17 and 85,564.77

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Solution

The fourth proportional to 87,139.41, 119,469.17 and 85,564.77 is: 117,310.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,139.41 : 119,469.17 = 85,564.77 : x
  2. Step 2: Convert to fraction form
    87,139.41/119,469.17 = 85,564.77/x
  3. Step 3: Cross multiply
    87,139.41x = 119,469.17 × 85,564.77
  4. Step 4: Simplify right side
    87,139.41x = 10,222,351,625.32
  5. Step 5: Solve for x
    x = 10,222,351,625.32/87,139.41
  6. Step 6: Final answer
    x = 117,310.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.