Home / 80,787.32-121,181.86-28,197

Finding the Fourth Proportional to 80,787.32, 121,181.86 and 28,197

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Solution

The fourth proportional to 80,787.32, 121,181.86 and 28,197 is: 42,295.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.32 : 121,181.86 = 28,197 : x
  2. Step 2: Convert to fraction form
    80,787.32/121,181.86 = 28,197/x
  3. Step 3: Cross multiply
    80,787.32x = 121,181.86 × 28,197
  4. Step 4: Simplify right side
    80,787.32x = 3,416,964,906.42
  5. Step 5: Solve for x
    x = 3,416,964,906.42/80,787.32
  6. Step 6: Final answer
    x = 42,295.81

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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.