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Finding the Fourth Proportional to 135,380.72, 186,798.84 and 85,050.56

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Solution

The fourth proportional to 135,380.72, 186,798.84 and 85,050.56 is: 117,353.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,380.72 : 186,798.84 = 85,050.56 : x
  2. Step 2: Convert to fraction form
    135,380.72/186,798.84 = 85,050.56/x
  3. Step 3: Cross multiply
    135,380.72x = 186,798.84 × 85,050.56
  4. Step 4: Simplify right side
    135,380.72x = 15,887,345,949.35
  5. Step 5: Solve for x
    x = 15,887,345,949.35/135,380.72
  6. Step 6: Final answer
    x = 117,353.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.