Home / 87,009.75-120,131.37-66,830.63

Finding the Fourth Proportional to 87,009.75, 120,131.37 and 66,830.63

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Solution

The fourth proportional to 87,009.75, 120,131.37 and 66,830.63 is: 92,270.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,009.75 : 120,131.37 = 66,830.63 : x
  2. Step 2: Convert to fraction form
    87,009.75/120,131.37 = 66,830.63/x
  3. Step 3: Cross multiply
    87,009.75x = 120,131.37 × 66,830.63
  4. Step 4: Simplify right side
    87,009.75x = 8,028,454,539.21
  5. Step 5: Solve for x
    x = 8,028,454,539.21/87,009.75
  6. Step 6: Final answer
    x = 92,270.75

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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.