Home / 80,787.58-121,236.74-28,197.07

Finding the Fourth Proportional to 80,787.58, 121,236.74 and 28,197.07

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Solution

The fourth proportional to 80,787.58, 121,236.74 and 28,197.07 is: 42,314.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.58 : 121,236.74 = 28,197.07 : x
  2. Step 2: Convert to fraction form
    80,787.58/121,236.74 = 28,197.07/x
  3. Step 3: Cross multiply
    80,787.58x = 121,236.74 × 28,197.07
  4. Step 4: Simplify right side
    80,787.58x = 3,418,520,844.35
  5. Step 5: Solve for x
    x = 3,418,520,844.35/80,787.58
  6. Step 6: Final answer
    x = 42,314.93

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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.