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Finding the Fourth Proportional to 221,255.84, 331,780.08 and 80,916.32

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Solution

The fourth proportional to 221,255.84, 331,780.08 and 80,916.32 is: 121,336.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,255.84 : 331,780.08 = 80,916.32 : x
  2. Step 2: Convert to fraction form
    221,255.84/331,780.08 = 80,916.32/x
  3. Step 3: Cross multiply
    221,255.84x = 331,780.08 × 80,916.32
  4. Step 4: Simplify right side
    221,255.84x = 26,846,423,122.91
  5. Step 5: Solve for x
    x = 26,846,423,122.91/221,255.84
  6. Step 6: Final answer
    x = 121,336.56

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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.