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Finding the Fourth Proportional to 135,953.70, 203,930.55 and 86,090.10

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Solution

The fourth proportional to 135,953.70, 203,930.55 and 86,090.10 is: 129,135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,953.70 : 203,930.55 = 86,090.10 : x
  2. Step 2: Convert to fraction form
    135,953.70/203,930.55 = 86,090.10/x
  3. Step 3: Cross multiply
    135,953.70x = 203,930.55 × 86,090.10
  4. Step 4: Simplify right side
    135,953.70x = 17,556,401,442.56
  5. Step 5: Solve for x
    x = 17,556,401,442.56/135,953.70
  6. Step 6: Final answer
    x = 129,135.15

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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.