Home / 213,919.52-319,579.18-138,424.64

Finding the Fourth Proportional to 213,919.52, 319,579.18 and 138,424.64

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Solution

The fourth proportional to 213,919.52, 319,579.18 and 138,424.64 is: 206,795.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,919.52 : 319,579.18 = 138,424.64 : x
  2. Step 2: Convert to fraction form
    213,919.52/319,579.18 = 138,424.64/x
  3. Step 3: Cross multiply
    213,919.52x = 319,579.18 × 138,424.64
  4. Step 4: Simplify right side
    213,919.52x = 44,237,632,943.00
  5. Step 5: Solve for x
    x = 44,237,632,943.00/213,919.52
  6. Step 6: Final answer
    x = 206,795.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.