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Finding the Fourth Proportional to 126,179.70, 189,269.55 and 103,629.30

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Solution

The fourth proportional to 126,179.70, 189,269.55 and 103,629.30 is: 155,443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,179.70 : 189,269.55 = 103,629.30 : x
  2. Step 2: Convert to fraction form
    126,179.70/189,269.55 = 103,629.30/x
  3. Step 3: Cross multiply
    126,179.70x = 189,269.55 × 103,629.30
  4. Step 4: Simplify right side
    126,179.70x = 19,613,870,977.82
  5. Step 5: Solve for x
    x = 19,613,870,977.82/126,179.70
  6. Step 6: Final answer
    x = 155,443.95

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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.