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Finding the Fourth Proportional to 126,486.78, 189,905.13 and 64,201.02

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Solution

The fourth proportional to 126,486.78, 189,905.13 and 64,201.02 is: 96,390.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,486.78 : 189,905.13 = 64,201.02 : x
  2. Step 2: Convert to fraction form
    126,486.78/189,905.13 = 64,201.02/x
  3. Step 3: Cross multiply
    126,486.78x = 189,905.13 × 64,201.02
  4. Step 4: Simplify right side
    126,486.78x = 12,192,103,049.23
  5. Step 5: Solve for x
    x = 12,192,103,049.23/126,486.78
  6. Step 6: Final answer
    x = 96,390.33

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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.