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Finding the Fourth Proportional to 72,519.35, 100,071.69 and 40,251.43

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Solution

The fourth proportional to 72,519.35, 100,071.69 and 40,251.43 is: 55,544.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,519.35 : 100,071.69 = 40,251.43 : x
  2. Step 2: Convert to fraction form
    72,519.35/100,071.69 = 40,251.43/x
  3. Step 3: Cross multiply
    72,519.35x = 100,071.69 × 40,251.43
  4. Step 4: Simplify right side
    72,519.35x = 4,028,028,257.88
  5. Step 5: Solve for x
    x = 4,028,028,257.88/72,519.35
  6. Step 6: Final answer
    x = 55,544.19

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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.