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Finding the Fourth Proportional to 75,978.36, 113,923.50 and 36,481.56

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Solution

The fourth proportional to 75,978.36, 113,923.50 and 36,481.56 is: 54,701.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,978.36 : 113,923.50 = 36,481.56 : x
  2. Step 2: Convert to fraction form
    75,978.36/113,923.50 = 36,481.56/x
  3. Step 3: Cross multiply
    75,978.36x = 113,923.50 × 36,481.56
  4. Step 4: Simplify right side
    75,978.36x = 4,156,107,000.66
  5. Step 5: Solve for x
    x = 4,156,107,000.66/75,978.36
  6. Step 6: Final answer
    x = 54,701.19

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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.