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Finding the Fourth Proportional to 203,178.60, 280,388.51 and 122,590.61

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Solution

The fourth proportional to 203,178.60, 280,388.51 and 122,590.61 is: 169,176.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,178.60 : 280,388.51 = 122,590.61 : x
  2. Step 2: Convert to fraction form
    203,178.60/280,388.51 = 122,590.61/x
  3. Step 3: Cross multiply
    203,178.60x = 280,388.51 × 122,590.61
  4. Step 4: Simplify right side
    203,178.60x = 34,372,999,896.14
  5. Step 5: Solve for x
    x = 34,372,999,896.14/203,178.60
  6. Step 6: Final answer
    x = 169,176.28

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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.