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Finding the Fourth Proportional to 82,869.80, 124,401.90 and 82,286.60

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Solution

The fourth proportional to 82,869.80, 124,401.90 and 82,286.60 is: 123,526.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,869.80 : 124,401.90 = 82,286.60 : x
  2. Step 2: Convert to fraction form
    82,869.80/124,401.90 = 82,286.60/x
  3. Step 3: Cross multiply
    82,869.80x = 124,401.90 × 82,286.60
  4. Step 4: Simplify right side
    82,869.80x = 10,236,609,384.54
  5. Step 5: Solve for x
    x = 10,236,609,384.54/82,869.80
  6. Step 6: Final answer
    x = 123,526.42

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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.