Home / 205,005.30-307,398.60-86,542.80

Finding the Fourth Proportional to 205,005.30, 307,398.60 and 86,542.80

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Solution

The fourth proportional to 205,005.30, 307,398.60 and 86,542.80 is: 129,768.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,005.30 : 307,398.60 = 86,542.80 : x
  2. Step 2: Convert to fraction form
    205,005.30/307,398.60 = 86,542.80/x
  3. Step 3: Cross multiply
    205,005.30x = 307,398.60 × 86,542.80
  4. Step 4: Simplify right side
    205,005.30x = 26,603,135,560.08
  5. Step 5: Solve for x
    x = 26,603,135,560.08/205,005.30
  6. Step 6: Final answer
    x = 129,768.04

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1.5x scale

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.