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Finding the Fourth Proportional to 121,687.80, 182,389.14 and 55,050.36

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Solution

The fourth proportional to 121,687.80, 182,389.14 and 55,050.36 is: 82,511.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,687.80 : 182,389.14 = 55,050.36 : x
  2. Step 2: Convert to fraction form
    121,687.80/182,389.14 = 55,050.36/x
  3. Step 3: Cross multiply
    121,687.80x = 182,389.14 × 55,050.36
  4. Step 4: Simplify right side
    121,687.80x = 10,040,587,817.09
  5. Step 5: Solve for x
    x = 10,040,587,817.09/121,687.80
  6. Step 6: Final answer
    x = 82,511.05

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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.