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Finding the Fourth Proportional to 65,331.63, 90,338.49 and 51,879.15

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Solution

The fourth proportional to 65,331.63, 90,338.49 and 51,879.15 is: 71,736.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,331.63 : 90,338.49 = 51,879.15 : x
  2. Step 2: Convert to fraction form
    65,331.63/90,338.49 = 51,879.15/x
  3. Step 3: Cross multiply
    65,331.63x = 90,338.49 × 51,879.15
  4. Step 4: Simplify right side
    65,331.63x = 4,686,684,073.48
  5. Step 5: Solve for x
    x = 4,686,684,073.48/65,331.63
  6. Step 6: Final answer
    x = 71,736.83

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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.