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Finding the Fourth Proportional to 69,906.09, 96,472.83 and 39,690.42

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Solution

The fourth proportional to 69,906.09, 96,472.83 and 39,690.42 is: 54,774.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,906.09 : 96,472.83 = 39,690.42 : x
  2. Step 2: Convert to fraction form
    69,906.09/96,472.83 = 39,690.42/x
  3. Step 3: Cross multiply
    69,906.09x = 96,472.83 × 39,690.42
  4. Step 4: Simplify right side
    69,906.09x = 3,829,047,141.29
  5. Step 5: Solve for x
    x = 3,829,047,141.29/69,906.09
  6. Step 6: Final answer
    x = 54,774.16

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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.