Home / 137,893.20-206,621.10-91,091.40

Finding the Fourth Proportional to 137,893.20, 206,621.10 and 91,091.40

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Solution

The fourth proportional to 137,893.20, 206,621.10 and 91,091.40 is: 136,492.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,893.20 : 206,621.10 = 91,091.40 : x
  2. Step 2: Convert to fraction form
    137,893.20/206,621.10 = 91,091.40/x
  3. Step 3: Cross multiply
    137,893.20x = 206,621.10 × 91,091.40
  4. Step 4: Simplify right side
    137,893.20x = 18,821,405,268.54
  5. Step 5: Solve for x
    x = 18,821,405,268.54/137,893.20
  6. Step 6: Final answer
    x = 136,492.63

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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.