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Finding the Fourth Proportional to 203,929.60, 281,308.80 and 128,346.88

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Solution

The fourth proportional to 203,929.60, 281,308.80 and 128,346.88 is: 177,046.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,929.60 : 281,308.80 = 128,346.88 : x
  2. Step 2: Convert to fraction form
    203,929.60/281,308.80 = 128,346.88/x
  3. Step 3: Cross multiply
    203,929.60x = 281,308.80 × 128,346.88
  4. Step 4: Simplify right side
    203,929.60x = 36,105,106,796.54
  5. Step 5: Solve for x
    x = 36,105,106,796.54/203,929.60
  6. Step 6: Final answer
    x = 177,046.92

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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.