Home / 138,033.80-207,172.20-81,803.60

Finding the Fourth Proportional to 138,033.80, 207,172.20 and 81,803.60

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Solution

The fourth proportional to 138,033.80, 207,172.20 and 81,803.60 is: 122,777.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,033.80 : 207,172.20 = 81,803.60 : x
  2. Step 2: Convert to fraction form
    138,033.80/207,172.20 = 81,803.60/x
  3. Step 3: Cross multiply
    138,033.80x = 207,172.20 × 81,803.60
  4. Step 4: Simplify right side
    138,033.80x = 16,947,431,779.92
  5. Step 5: Solve for x
    x = 16,947,431,779.92/138,033.80
  6. Step 6: Final answer
    x = 122,777.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.