Home / 137,739.80-206,731.20-81,509.60

Finding the Fourth Proportional to 137,739.80, 206,731.20 and 81,509.60

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Solution

The fourth proportional to 137,739.80, 206,731.20 and 81,509.60 is: 122,336.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,739.80 : 206,731.20 = 81,509.60 : x
  2. Step 2: Convert to fraction form
    137,739.80/206,731.20 = 81,509.60/x
  3. Step 3: Cross multiply
    137,739.80x = 206,731.20 × 81,509.60
  4. Step 4: Simplify right side
    137,739.80x = 16,850,577,419.52
  5. Step 5: Solve for x
    x = 16,850,577,419.52/137,739.80
  6. Step 6: Final answer
    x = 122,336.30

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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.