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Finding the Fourth Proportional to 203,979.91, 305,864.27 and 91,563.32

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Solution

The fourth proportional to 203,979.91, 305,864.27 and 91,563.32 is: 137,297.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,979.91 : 305,864.27 = 91,563.32 : x
  2. Step 2: Convert to fraction form
    203,979.91/305,864.27 = 91,563.32/x
  3. Step 3: Cross multiply
    203,979.91x = 305,864.27 × 91,563.32
  4. Step 4: Simplify right side
    203,979.91x = 28,005,948,030.58
  5. Step 5: Solve for x
    x = 28,005,948,030.58/203,979.91
  6. Step 6: Final answer
    x = 137,297.58

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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.