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Finding the Fourth Proportional to 137,393.58, 206,080.49 and 42,621.30

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Solution

The fourth proportional to 137,393.58, 206,080.49 and 42,621.30 is: 63,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,393.58 : 206,080.49 = 42,621.30 : x
  2. Step 2: Convert to fraction form
    137,393.58/206,080.49 = 42,621.30/x
  3. Step 3: Cross multiply
    137,393.58x = 206,080.49 × 42,621.30
  4. Step 4: Simplify right side
    137,393.58x = 8,783,418,388.44
  5. Step 5: Solve for x
    x = 8,783,418,388.44/137,393.58
  6. Step 6: Final answer
    x = 63,928.89

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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.