Home / 71,731.76-98,989.20-39,901.44

Finding the Fourth Proportional to 71,731.76, 98,989.20 and 39,901.44

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Solution

The fourth proportional to 71,731.76, 98,989.20 and 39,901.44 is: 55,063.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,731.76 : 98,989.20 = 39,901.44 : x
  2. Step 2: Convert to fraction form
    71,731.76/98,989.20 = 39,901.44/x
  3. Step 3: Cross multiply
    71,731.76x = 98,989.20 × 39,901.44
  4. Step 4: Simplify right side
    71,731.76x = 3,949,811,624.45
  5. Step 5: Solve for x
    x = 3,949,811,624.45/71,731.76
  6. Step 6: Final answer
    x = 55,063.64

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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.