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Finding the Fourth Proportional to 78,901.81, 108,885.19 and 44,912.49

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Solution

The fourth proportional to 78,901.81, 108,885.19 and 44,912.49 is: 61,979.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,901.81 : 108,885.19 = 44,912.49 : x
  2. Step 2: Convert to fraction form
    78,901.81/108,885.19 = 44,912.49/x
  3. Step 3: Cross multiply
    78,901.81x = 108,885.19 × 44,912.49
  4. Step 4: Simplify right side
    78,901.81x = 4,890,304,651.97
  5. Step 5: Solve for x
    x = 4,890,304,651.97/78,901.81
  6. Step 6: Final answer
    x = 61,979.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.