Home / 87,640.32-120,968.42-51,842.78

Finding the Fourth Proportional to 87,640.32, 120,968.42 and 51,842.78

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Solution

The fourth proportional to 87,640.32, 120,968.42 and 51,842.78 is: 71,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,640.32 : 120,968.42 = 51,842.78 : x
  2. Step 2: Convert to fraction form
    87,640.32/120,968.42 = 51,842.78/x
  3. Step 3: Cross multiply
    87,640.32x = 120,968.42 × 51,842.78
  4. Step 4: Simplify right side
    87,640.32x = 6,271,339,185.01
  5. Step 5: Solve for x
    x = 6,271,339,185.01/87,640.32
  6. Step 6: Final answer
    x = 71,557.69

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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.