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Finding the Fourth Proportional to 203,508.15, 305,189.32 and 103,635.15

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Solution

The fourth proportional to 203,508.15, 305,189.32 and 103,635.15 is: 155,415.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,508.15 : 305,189.32 = 103,635.15 : x
  2. Step 2: Convert to fraction form
    203,508.15/305,189.32 = 103,635.15/x
  3. Step 3: Cross multiply
    203,508.15x = 305,189.32 × 103,635.15
  4. Step 4: Simplify right side
    203,508.15x = 31,628,340,956.60
  5. Step 5: Solve for x
    x = 31,628,340,956.60/203,508.15
  6. Step 6: Final answer
    x = 155,415.60

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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.