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Finding the Fourth Proportional to 57,978.92, 86,978.76 and 29,891.43

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Solution

The fourth proportional to 57,978.92, 86,978.76 and 29,891.43 is: 44,842.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,978.92 : 86,978.76 = 29,891.43 : x
  2. Step 2: Convert to fraction form
    57,978.92/86,978.76 = 29,891.43/x
  3. Step 3: Cross multiply
    57,978.92x = 86,978.76 × 29,891.43
  4. Step 4: Simplify right side
    57,978.92x = 2,599,919,382.92
  5. Step 5: Solve for x
    x = 2,599,919,382.92/57,978.92
  6. Step 6: Final answer
    x = 44,842.50

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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.