Home / 87,690.72-120,847.86-63,450.66

Finding the Fourth Proportional to 87,690.72, 120,847.86 and 63,450.66

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Solution

The fourth proportional to 87,690.72, 120,847.86 and 63,450.66 is: 87,442.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,690.72 : 120,847.86 = 63,450.66 : x
  2. Step 2: Convert to fraction form
    87,690.72/120,847.86 = 63,450.66/x
  3. Step 3: Cross multiply
    87,690.72x = 120,847.86 × 63,450.66
  4. Step 4: Simplify right side
    87,690.72x = 7,667,876,476.59
  5. Step 5: Solve for x
    x = 7,667,876,476.59/87,690.72
  6. Step 6: Final answer
    x = 87,442.28

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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.