Home / 213,923.52-319,585.16-138,428.64

Finding the Fourth Proportional to 213,923.52, 319,585.16 and 138,428.64

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Solution

The fourth proportional to 213,923.52, 319,585.16 and 138,428.64 is: 206,801.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,923.52 : 319,585.16 = 138,428.64 : x
  2. Step 2: Convert to fraction form
    213,923.52/319,585.16 = 138,428.64/x
  3. Step 3: Cross multiply
    213,923.52x = 319,585.16 × 138,428.64
  4. Step 4: Simplify right side
    213,923.52x = 44,239,739,062.98
  5. Step 5: Solve for x
    x = 44,239,739,062.98/213,923.52
  6. Step 6: Final answer
    x = 206,801.66

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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.