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Finding the Fourth Proportional to 203,937.53, 305,950.05 and 85,540.64

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Solution

The fourth proportional to 203,937.53, 305,950.05 and 85,540.64 is: 128,329.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,937.53 : 305,950.05 = 85,540.64 : x
  2. Step 2: Convert to fraction form
    203,937.53/305,950.05 = 85,540.64/x
  3. Step 3: Cross multiply
    203,937.53x = 305,950.05 × 85,540.64
  4. Step 4: Simplify right side
    203,937.53x = 26,171,161,555.28
  5. Step 5: Solve for x
    x = 26,171,161,555.28/203,937.53
  6. Step 6: Final answer
    x = 128,329.31

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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.