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Finding the Fourth Proportional to 221,259.84, 331,786.08 and 80,920.32

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Solution

The fourth proportional to 221,259.84, 331,786.08 and 80,920.32 is: 121,342.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,259.84 : 331,786.08 = 80,920.32 : x
  2. Step 2: Convert to fraction form
    221,259.84/331,786.08 = 80,920.32/x
  3. Step 3: Cross multiply
    221,259.84x = 331,786.08 × 80,920.32
  4. Step 4: Simplify right side
    221,259.84x = 26,848,235,765.15
  5. Step 5: Solve for x
    x = 26,848,235,765.15/221,259.84
  6. Step 6: Final answer
    x = 121,342.56

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1.5x scale

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.