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Finding the Fourth Proportional to 69,086.99, 103,091.67 and 61,640.26

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Solution

The fourth proportional to 69,086.99, 103,091.67 and 61,640.26 is: 91,979.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,086.99 : 103,091.67 = 61,640.26 : x
  2. Step 2: Convert to fraction form
    69,086.99/103,091.67 = 61,640.26/x
  3. Step 3: Cross multiply
    69,086.99x = 103,091.67 × 61,640.26
  4. Step 4: Simplify right side
    69,086.99x = 6,354,597,084.91
  5. Step 5: Solve for x
    x = 6,354,597,084.91/69,086.99
  6. Step 6: Final answer
    x = 91,979.65

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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.