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Finding the Fourth Proportional to 245,630.30, 338,972.92 and 138,200.54

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Solution

The fourth proportional to 245,630.30, 338,972.92 and 138,200.54 is: 190,718.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,630.30 : 338,972.92 = 138,200.54 : x
  2. Step 2: Convert to fraction form
    245,630.30/338,972.92 = 138,200.54/x
  3. Step 3: Cross multiply
    245,630.30x = 338,972.92 × 138,200.54
  4. Step 4: Simplify right side
    245,630.30x = 46,846,238,549.01
  5. Step 5: Solve for x
    x = 46,846,238,549.01/245,630.30
  6. Step 6: Final answer
    x = 190,718.49

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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.