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Finding the Fourth Proportional to 57,385.94, 86,081.79 and 40,698.32

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Solution

The fourth proportional to 57,385.94, 86,081.79 and 40,698.32 is: 61,049.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,385.94 : 86,081.79 = 40,698.32 : x
  2. Step 2: Convert to fraction form
    57,385.94/86,081.79 = 40,698.32/x
  3. Step 3: Cross multiply
    57,385.94x = 86,081.79 × 40,698.32
  4. Step 4: Simplify right side
    57,385.94x = 3,503,383,805.18
  5. Step 5: Solve for x
    x = 3,503,383,805.18/57,385.94
  6. Step 6: Final answer
    x = 61,049.52

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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.