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Finding the Fourth Proportional to 51,479.92, 77,217.96 and 18,647.92

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Solution

The fourth proportional to 51,479.92, 77,217.96 and 18,647.92 is: 27,971.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,479.92 : 77,217.96 = 18,647.92 : x
  2. Step 2: Convert to fraction form
    51,479.92/77,217.96 = 18,647.92/x
  3. Step 3: Cross multiply
    51,479.92x = 77,217.96 × 18,647.92
  4. Step 4: Simplify right side
    51,479.92x = 1,439,954,340.64
  5. Step 5: Solve for x
    x = 1,439,954,340.64/51,479.92
  6. Step 6: Final answer
    x = 27,971.18

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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.