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Finding the Fourth Proportional to 245,632.92, 338,976.55 and 138,203.16

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Solution

The fourth proportional to 245,632.92, 338,976.55 and 138,203.16 is: 190,722.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,632.92 : 338,976.55 = 138,203.16 : x
  2. Step 2: Convert to fraction form
    245,632.92/338,976.55 = 138,203.16/x
  3. Step 3: Cross multiply
    245,632.92x = 338,976.55 × 138,203.16
  4. Step 4: Simplify right side
    245,632.92x = 46,847,630,375.90
  5. Step 5: Solve for x
    x = 46,847,630,375.90/245,632.92
  6. Step 6: Final answer
    x = 190,722.12

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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.