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Finding the Fourth Proportional to 72,665.46, 100,279.52 and 39,961.26

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Solution

The fourth proportional to 72,665.46, 100,279.52 and 39,961.26 is: 55,147.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,665.46 : 100,279.52 = 39,961.26 : x
  2. Step 2: Convert to fraction form
    72,665.46/100,279.52 = 39,961.26/x
  3. Step 3: Cross multiply
    72,665.46x = 100,279.52 × 39,961.26
  4. Step 4: Simplify right side
    72,665.46x = 4,007,295,771.59
  5. Step 5: Solve for x
    x = 4,007,295,771.59/72,665.46
  6. Step 6: Final answer
    x = 55,147.19

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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.