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Finding the Fourth Proportional to 72,631.26, 100,228.41 and 40,367.88

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Solution

The fourth proportional to 72,631.26, 100,228.41 and 40,367.88 is: 55,706.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,631.26 : 100,228.41 = 40,367.88 : x
  2. Step 2: Convert to fraction form
    72,631.26/100,228.41 = 40,367.88/x
  3. Step 3: Cross multiply
    72,631.26x = 100,228.41 × 40,367.88
  4. Step 4: Simplify right side
    72,631.26x = 4,046,008,427.47
  5. Step 5: Solve for x
    x = 4,046,008,427.47/72,631.26
  6. Step 6: Final answer
    x = 55,706.16

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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.