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Finding the Fourth Proportional to 245,641.59, 338,957.97 and 138,209.31

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Solution

The fourth proportional to 245,641.59, 338,957.97 and 138,209.31 is: 190,713.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,641.59 : 338,957.97 = 138,209.31 : x
  2. Step 2: Convert to fraction form
    245,641.59/338,957.97 = 138,209.31/x
  3. Step 3: Cross multiply
    245,641.59x = 338,957.97 × 138,209.31
  4. Step 4: Simplify right side
    245,641.59x = 46,847,147,587.74
  5. Step 5: Solve for x
    x = 46,847,147,587.74/245,641.59
  6. Step 6: Final answer
    x = 190,713.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.