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Finding the Fourth Proportional to 203,561.76, 305,327.28 and 103,659.36

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Solution

The fourth proportional to 203,561.76, 305,327.28 and 103,659.36 is: 155,481.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,561.76 : 305,327.28 = 103,659.36 : x
  2. Step 2: Convert to fraction form
    203,561.76/305,327.28 = 103,659.36/x
  3. Step 3: Cross multiply
    203,561.76x = 305,327.28 × 103,659.36
  4. Step 4: Simplify right side
    203,561.76x = 31,650,030,435.34
  5. Step 5: Solve for x
    x = 31,650,030,435.34/203,561.76
  6. Step 6: Final answer
    x = 155,481.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.