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Finding the Fourth Proportional to 135,507.60, 203,386.20 and 68,995.56

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Solution

The fourth proportional to 135,507.60, 203,386.20 and 68,995.56 is: 103,556.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,507.60 : 203,386.20 = 68,995.56 : x
  2. Step 2: Convert to fraction form
    135,507.60/203,386.20 = 68,995.56/x
  3. Step 3: Cross multiply
    135,507.60x = 203,386.20 × 68,995.56
  4. Step 4: Simplify right side
    135,507.60x = 14,032,744,765.27
  5. Step 5: Solve for x
    x = 14,032,744,765.27/135,507.60
  6. Step 6: Final answer
    x = 103,556.88

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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.