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Finding the Fourth Proportional to 71,929.92, 99,263.04 and 40,099.20

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Solution

The fourth proportional to 71,929.92, 99,263.04 and 40,099.20 is: 55,336.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,929.92 : 99,263.04 = 40,099.20 : x
  2. Step 2: Convert to fraction form
    71,929.92/99,263.04 = 40,099.20/x
  3. Step 3: Cross multiply
    71,929.92x = 99,263.04 × 40,099.20
  4. Step 4: Simplify right side
    71,929.92x = 3,980,368,493.57
  5. Step 5: Solve for x
    x = 3,980,368,493.57/71,929.92
  6. Step 6: Final answer
    x = 55,336.76

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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.