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Finding the Fourth Proportional to 135,503.52, 203,134.32 and 68,906.40

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Solution

The fourth proportional to 135,503.52, 203,134.32 and 68,906.40 is: 103,298.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,503.52 : 203,134.32 = 68,906.40 : x
  2. Step 2: Convert to fraction form
    135,503.52/203,134.32 = 68,906.40/x
  3. Step 3: Cross multiply
    135,503.52x = 203,134.32 × 68,906.40
  4. Step 4: Simplify right side
    135,503.52x = 13,997,254,707.65
  5. Step 5: Solve for x
    x = 13,997,254,707.65/135,503.52
  6. Step 6: Final answer
    x = 103,298.09

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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.