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Finding the Fourth Proportional to 57,920.29, 86,716.60 and 36,808

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Solution

The fourth proportional to 57,920.29, 86,716.60 and 36,808 is: 55,107.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,920.29 : 86,716.60 = 36,808 : x
  2. Step 2: Convert to fraction form
    57,920.29/86,716.60 = 36,808/x
  3. Step 3: Cross multiply
    57,920.29x = 86,716.60 × 36,808
  4. Step 4: Simplify right side
    57,920.29x = 3,191,864,612.80
  5. Step 5: Solve for x
    x = 3,191,864,612.80/57,920.29
  6. Step 6: Final answer
    x = 55,107.88

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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.