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Finding the Fourth Proportional to 72,511.82, 100,064.78 and 40,244.56

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Solution

The fourth proportional to 72,511.82, 100,064.78 and 40,244.56 is: 55,536.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,511.82 : 100,064.78 = 40,244.56 : x
  2. Step 2: Convert to fraction form
    72,511.82/100,064.78 = 40,244.56/x
  3. Step 3: Cross multiply
    72,511.82x = 100,064.78 × 40,244.56
  4. Step 4: Simplify right side
    72,511.82x = 4,027,063,042.60
  5. Step 5: Solve for x
    x = 4,027,063,042.60/72,511.82
  6. Step 6: Final answer
    x = 55,536.64

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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.