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Finding the Fourth Proportional to 72,832, 108,414.08 and 69,433.60

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Solution

The fourth proportional to 72,832, 108,414.08 and 69,433.60 is: 103,355.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,832 : 108,414.08 = 69,433.60 : x
  2. Step 2: Convert to fraction form
    72,832/108,414.08 = 69,433.60/x
  3. Step 3: Cross multiply
    72,832x = 108,414.08 × 69,433.60
  4. Step 4: Simplify right side
    72,832x = 7,527,579,865.09
  5. Step 5: Solve for x
    x = 7,527,579,865.09/72,832
  6. Step 6: Final answer
    x = 103,355.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.