Home / 205,038.20-307,557.30-120,711.80

Finding the Fourth Proportional to 205,038.20, 307,557.30 and 120,711.80

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Solution

The fourth proportional to 205,038.20, 307,557.30 and 120,711.80 is: 181,067.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,038.20 : 307,557.30 = 120,711.80 : x
  2. Step 2: Convert to fraction form
    205,038.20/307,557.30 = 120,711.80/x
  3. Step 3: Cross multiply
    205,038.20x = 307,557.30 × 120,711.80
  4. Step 4: Simplify right side
    205,038.20x = 37,125,795,286.14
  5. Step 5: Solve for x
    x = 37,125,795,286.14/205,038.20
  6. Step 6: Final answer
    x = 181,067.70

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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.