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Finding the Fourth Proportional to 240,471.78, 331,957.35 and 143,709.78

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Solution

The fourth proportional to 240,471.78, 331,957.35 and 143,709.78 is: 198,383.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,471.78 : 331,957.35 = 143,709.78 : x
  2. Step 2: Convert to fraction form
    240,471.78/331,957.35 = 143,709.78/x
  3. Step 3: Cross multiply
    240,471.78x = 331,957.35 × 143,709.78
  4. Step 4: Simplify right side
    240,471.78x = 47,705,517,737.88
  5. Step 5: Solve for x
    x = 47,705,517,737.88/240,471.78
  6. Step 6: Final answer
    x = 198,383.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.