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Finding the Fourth Proportional to 72,636.84, 100,236.52 and 40,371.30

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Solution

The fourth proportional to 72,636.84, 100,236.52 and 40,371.30 is: 55,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,636.84 : 100,236.52 = 40,371.30 : x
  2. Step 2: Convert to fraction form
    72,636.84/100,236.52 = 40,371.30/x
  3. Step 3: Cross multiply
    72,636.84x = 100,236.52 × 40,371.30
  4. Step 4: Simplify right side
    72,636.84x = 4,046,678,619.88
  5. Step 5: Solve for x
    x = 4,046,678,619.88/72,636.84
  6. Step 6: Final answer
    x = 55,711.10

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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.