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Finding the Fourth Proportional to 72,806.64, 109,069.89 and 44,644.49

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Solution

The fourth proportional to 72,806.64, 109,069.89 and 44,644.49 is: 66,880.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,806.64 : 109,069.89 = 44,644.49 : x
  2. Step 2: Convert to fraction form
    72,806.64/109,069.89 = 44,644.49/x
  3. Step 3: Cross multiply
    72,806.64x = 109,069.89 × 44,644.49
  4. Step 4: Simplify right side
    72,806.64x = 4,869,369,613.41
  5. Step 5: Solve for x
    x = 4,869,369,613.41/72,806.64
  6. Step 6: Final answer
    x = 66,880.85

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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.