Home / 82,787.20-124,326.60-80,162.80

Finding the Fourth Proportional to 82,787.20, 124,326.60 and 80,162.80

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Solution

The fourth proportional to 82,787.20, 124,326.60 and 80,162.80 is: 120,385.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,787.20 : 124,326.60 = 80,162.80 : x
  2. Step 2: Convert to fraction form
    82,787.20/124,326.60 = 80,162.80/x
  3. Step 3: Cross multiply
    82,787.20x = 124,326.60 × 80,162.80
  4. Step 4: Simplify right side
    82,787.20x = 9,966,368,370.48
  5. Step 5: Solve for x
    x = 9,966,368,370.48/82,787.20
  6. Step 6: Final answer
    x = 120,385.38

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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.