Home / 205,078.20-307,617.30-120,751.80

Finding the Fourth Proportional to 205,078.20, 307,617.30 and 120,751.80

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Solution

The fourth proportional to 205,078.20, 307,617.30 and 120,751.80 is: 181,127.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,078.20 : 307,617.30 = 120,751.80 : x
  2. Step 2: Convert to fraction form
    205,078.20/307,617.30 = 120,751.80/x
  3. Step 3: Cross multiply
    205,078.20x = 307,617.30 × 120,751.80
  4. Step 4: Simplify right side
    205,078.20x = 37,145,342,686.14
  5. Step 5: Solve for x
    x = 37,145,342,686.14/205,078.20
  6. Step 6: Final answer
    x = 181,127.70

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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.