Home / 87,860.86-131,698.34-28,680.64

Finding the Fourth Proportional to 87,860.86, 131,698.34 and 28,680.64

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Solution

The fourth proportional to 87,860.86, 131,698.34 and 28,680.64 is: 42,990.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,860.86 : 131,698.34 = 28,680.64 : x
  2. Step 2: Convert to fraction form
    87,860.86/131,698.34 = 28,680.64/x
  3. Step 3: Cross multiply
    87,860.86x = 131,698.34 × 28,680.64
  4. Step 4: Simplify right side
    87,860.86x = 3,777,192,678.14
  5. Step 5: Solve for x
    x = 3,777,192,678.14/87,860.86
  6. Step 6: Final answer
    x = 42,990.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.