Home / 50,540.64-75,778.52-20,978.88

Finding the Fourth Proportional to 50,540.64, 75,778.52 and 20,978.88

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Solution

The fourth proportional to 50,540.64, 75,778.52 and 20,978.88 is: 31,454.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,540.64 : 75,778.52 = 20,978.88 : x
  2. Step 2: Convert to fraction form
    50,540.64/75,778.52 = 20,978.88/x
  3. Step 3: Cross multiply
    50,540.64x = 75,778.52 × 20,978.88
  4. Step 4: Simplify right side
    50,540.64x = 1,589,748,477.66
  5. Step 5: Solve for x
    x = 1,589,748,477.66/50,540.64
  6. Step 6: Final answer
    x = 31,454.85

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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.