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Finding the Fourth Proportional to 352,909.52, 529,053.24 and 131,138

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Solution

The fourth proportional to 352,909.52, 529,053.24 and 131,138 is: 196,591.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,909.52 : 529,053.24 = 131,138 : x
  2. Step 2: Convert to fraction form
    352,909.52/529,053.24 = 131,138/x
  3. Step 3: Cross multiply
    352,909.52x = 529,053.24 × 131,138
  4. Step 4: Simplify right side
    352,909.52x = 69,378,983,787.12
  5. Step 5: Solve for x
    x = 69,378,983,787.12/352,909.52
  6. Step 6: Final answer
    x = 196,591.42

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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.