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Finding the Fourth Proportional to 69,021.78, 103,512.67 and 26,892.47

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Solution

The fourth proportional to 69,021.78, 103,512.67 and 26,892.47 is: 40,330.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,021.78 : 103,512.67 = 26,892.47 : x
  2. Step 2: Convert to fraction form
    69,021.78/103,512.67 = 26,892.47/x
  3. Step 3: Cross multiply
    69,021.78x = 103,512.67 × 26,892.47
  4. Step 4: Simplify right side
    69,021.78x = 2,783,711,496.91
  5. Step 5: Solve for x
    x = 2,783,711,496.91/69,021.78
  6. Step 6: Final answer
    x = 40,330.91

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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.