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Finding the Fourth Proportional to 126,293.88, 189,427.86 and 79,404.60

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Solution

The fourth proportional to 126,293.88, 189,427.86 and 79,404.60 is: 119,098.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,293.88 : 189,427.86 = 79,404.60 : x
  2. Step 2: Convert to fraction form
    126,293.88/189,427.86 = 79,404.60/x
  3. Step 3: Cross multiply
    126,293.88x = 189,427.86 × 79,404.60
  4. Step 4: Simplify right side
    126,293.88x = 15,041,443,452.16
  5. Step 5: Solve for x
    x = 15,041,443,452.16/126,293.88
  6. Step 6: Final answer
    x = 119,098.75

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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.