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Finding the Fourth Proportional to 50,640.78, 69,883.11 and 27,978.60

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Solution

The fourth proportional to 50,640.78, 69,883.11 and 27,978.60 is: 38,609.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,640.78 : 69,883.11 = 27,978.60 : x
  2. Step 2: Convert to fraction form
    50,640.78/69,883.11 = 27,978.60/x
  3. Step 3: Cross multiply
    50,640.78x = 69,883.11 × 27,978.60
  4. Step 4: Simplify right side
    50,640.78x = 1,955,231,581.45
  5. Step 5: Solve for x
    x = 1,955,231,581.45/50,640.78
  6. Step 6: Final answer
    x = 38,609.82

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1.5x scale

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.