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Finding the Fourth Proportional to 221,257.84, 331,783.08 and 80,918.32

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Solution

The fourth proportional to 221,257.84, 331,783.08 and 80,918.32 is: 121,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,257.84 : 331,783.08 = 80,918.32 : x
  2. Step 2: Convert to fraction form
    221,257.84/331,783.08 = 80,918.32/x
  3. Step 3: Cross multiply
    221,257.84x = 331,783.08 × 80,918.32
  4. Step 4: Simplify right side
    221,257.84x = 26,847,329,438.03
  5. Step 5: Solve for x
    x = 26,847,329,438.03/221,257.84
  6. Step 6: Final answer
    x = 121,339.56

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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.