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Finding the Fourth Proportional to 203,612.28, 280,972.28 and 122,992.20

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Solution

The fourth proportional to 203,612.28, 280,972.28 and 122,992.20 is: 169,721.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,612.28 : 280,972.28 = 122,992.20 : x
  2. Step 2: Convert to fraction form
    203,612.28/280,972.28 = 122,992.20/x
  3. Step 3: Cross multiply
    203,612.28x = 280,972.28 × 122,992.20
  4. Step 4: Simplify right side
    203,612.28x = 34,557,398,856.22
  5. Step 5: Solve for x
    x = 34,557,398,856.22/203,612.28
  6. Step 6: Final answer
    x = 169,721.58

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1.5x scale

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.