Home / 278,787.32-418,181.31-76,385.15

Finding the Fourth Proportional to 278,787.32, 418,181.31 and 76,385.15

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Solution

The fourth proportional to 278,787.32, 418,181.31 and 76,385.15 is: 114,577.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,787.32 : 418,181.31 = 76,385.15 : x
  2. Step 2: Convert to fraction form
    278,787.32/418,181.31 = 76,385.15/x
  3. Step 3: Cross multiply
    278,787.32x = 418,181.31 × 76,385.15
  4. Step 4: Simplify right side
    278,787.32x = 31,942,840,000.64
  5. Step 5: Solve for x
    x = 31,942,840,000.64/278,787.32
  6. Step 6: Final answer
    x = 114,577.81

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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.