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Finding the Fourth Proportional to 50,919.84, 76,388.22 and 21,339.90

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Solution

The fourth proportional to 50,919.84, 76,388.22 and 21,339.90 is: 32,013.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,919.84 : 76,388.22 = 21,339.90 : x
  2. Step 2: Convert to fraction form
    50,919.84/76,388.22 = 21,339.90/x
  3. Step 3: Cross multiply
    50,919.84x = 76,388.22 × 21,339.90
  4. Step 4: Simplify right side
    50,919.84x = 1,630,116,975.98
  5. Step 5: Solve for x
    x = 1,630,116,975.98/50,919.84
  6. Step 6: Final answer
    x = 32,013.40

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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.