Home / 205,078.40-307,617.60-72,108.80

Finding the Fourth Proportional to 205,078.40, 307,617.60 and 72,108.80

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Solution

The fourth proportional to 205,078.40, 307,617.60 and 72,108.80 is: 108,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,078.40 : 307,617.60 = 72,108.80 : x
  2. Step 2: Convert to fraction form
    205,078.40/307,617.60 = 72,108.80/x
  3. Step 3: Cross multiply
    205,078.40x = 307,617.60 × 72,108.80
  4. Step 4: Simplify right side
    205,078.40x = 22,181,935,994.88
  5. Step 5: Solve for x
    x = 22,181,935,994.88/205,078.40
  6. Step 6: Final answer
    x = 108,163.20

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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.