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Finding the Fourth Proportional to 221,123.60, 331,685.40 and 54,911.60

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Solution

The fourth proportional to 221,123.60, 331,685.40 and 54,911.60 is: 82,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,123.60 : 331,685.40 = 54,911.60 : x
  2. Step 2: Convert to fraction form
    221,123.60/331,685.40 = 54,911.60/x
  3. Step 3: Cross multiply
    221,123.60x = 331,685.40 × 54,911.60
  4. Step 4: Simplify right side
    221,123.60x = 18,213,376,010.64
  5. Step 5: Solve for x
    x = 18,213,376,010.64/221,123.60
  6. Step 6: Final answer
    x = 82,367.40

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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.