Home / 82,660.20-123,990.30-53,135.70

Finding the Fourth Proportional to 82,660.20, 123,990.30 and 53,135.70

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Solution

The fourth proportional to 82,660.20, 123,990.30 and 53,135.70 is: 79,703.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,660.20 : 123,990.30 = 53,135.70 : x
  2. Step 2: Convert to fraction form
    82,660.20/123,990.30 = 53,135.70/x
  3. Step 3: Cross multiply
    82,660.20x = 123,990.30 × 53,135.70
  4. Step 4: Simplify right side
    82,660.20x = 6,588,311,383.71
  5. Step 5: Solve for x
    x = 6,588,311,383.71/82,660.20
  6. Step 6: Final answer
    x = 79,703.55

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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.