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Finding the Fourth Proportional to 137,311.20, 205,621.20 and 131,090.40

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Solution

The fourth proportional to 137,311.20, 205,621.20 and 131,090.40 is: 196,305.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,311.20 : 205,621.20 = 131,090.40 : x
  2. Step 2: Convert to fraction form
    137,311.20/205,621.20 = 131,090.40/x
  3. Step 3: Cross multiply
    137,311.20x = 205,621.20 × 131,090.40
  4. Step 4: Simplify right side
    137,311.20x = 26,954,965,356.48
  5. Step 5: Solve for x
    x = 26,954,965,356.48/137,311.20
  6. Step 6: Final answer
    x = 196,305.66

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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.