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Finding the Fourth Proportional to 137,067.20, 205,730.40 and 84,579.20

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Solution

The fourth proportional to 137,067.20, 205,730.40 and 84,579.20 is: 126,948.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,067.20 : 205,730.40 = 84,579.20 : x
  2. Step 2: Convert to fraction form
    137,067.20/205,730.40 = 84,579.20/x
  3. Step 3: Cross multiply
    137,067.20x = 205,730.40 × 84,579.20
  4. Step 4: Simplify right side
    137,067.20x = 17,400,512,647.68
  5. Step 5: Solve for x
    x = 17,400,512,647.68/137,067.20
  6. Step 6: Final answer
    x = 126,948.77

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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.