Home / 87,010.13-120,131.90-66,831

Finding the Fourth Proportional to 87,010.13, 120,131.90 and 66,831

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Solution

The fourth proportional to 87,010.13, 120,131.90 and 66,831 is: 92,271.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,010.13 : 120,131.90 = 66,831 : x
  2. Step 2: Convert to fraction form
    87,010.13/120,131.90 = 66,831/x
  3. Step 3: Cross multiply
    87,010.13x = 120,131.90 × 66,831
  4. Step 4: Simplify right side
    87,010.13x = 8,028,534,674.75
  5. Step 5: Solve for x
    x = 8,028,534,674.75/87,010.13
  6. Step 6: Final answer
    x = 92,271.27

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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.