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Finding the Fourth Proportional to 57,906.95, 86,872.60 and 19,959.68

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Solution

The fourth proportional to 57,906.95, 86,872.60 and 19,959.68 is: 29,943.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,906.95 : 86,872.60 = 19,959.68 : x
  2. Step 2: Convert to fraction form
    57,906.95/86,872.60 = 19,959.68/x
  3. Step 3: Cross multiply
    57,906.95x = 86,872.60 × 19,959.68
  4. Step 4: Simplify right side
    57,906.95x = 1,733,949,296.77
  5. Step 5: Solve for x
    x = 1,733,949,296.77/57,906.95
  6. Step 6: Final answer
    x = 29,943.72

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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.