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Finding the Fourth Proportional to 126,616.11, 189,854.06 and 51,788.81

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Solution

The fourth proportional to 126,616.11, 189,854.06 and 51,788.81 is: 77,654.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,616.11 : 189,854.06 = 51,788.81 : x
  2. Step 2: Convert to fraction form
    126,616.11/189,854.06 = 51,788.81/x
  3. Step 3: Cross multiply
    126,616.11x = 189,854.06 × 51,788.81
  4. Step 4: Simplify right side
    126,616.11x = 9,832,314,632.85
  5. Step 5: Solve for x
    x = 9,832,314,632.85/126,616.11
  6. Step 6: Final answer
    x = 77,654.53

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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.