Home / 137,787.20-206,335.20-90,785.60

Finding the Fourth Proportional to 137,787.20, 206,335.20 and 90,785.60

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Solution

The fourth proportional to 137,787.20, 206,335.20 and 90,785.60 is: 135,950.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,787.20 : 206,335.20 = 90,785.60 : x
  2. Step 2: Convert to fraction form
    137,787.20/206,335.20 = 90,785.60/x
  3. Step 3: Cross multiply
    137,787.20x = 206,335.20 × 90,785.60
  4. Step 4: Simplify right side
    137,787.20x = 18,732,264,933.12
  5. Step 5: Solve for x
    x = 18,732,264,933.12/137,787.20
  6. Step 6: Final answer
    x = 135,950.69

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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.