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Finding the Fourth Proportional to 137,392.49, 206,118.22 and 42,620.67

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Solution

The fourth proportional to 137,392.49, 206,118.22 and 42,620.67 is: 63,940.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,392.49 : 206,118.22 = 42,620.67 : x
  2. Step 2: Convert to fraction form
    137,392.49/206,118.22 = 42,620.67/x
  3. Step 3: Cross multiply
    137,392.49x = 206,118.22 × 42,620.67
  4. Step 4: Simplify right side
    137,392.49x = 8,784,896,635.61
  5. Step 5: Solve for x
    x = 8,784,896,635.61/137,392.49
  6. Step 6: Final answer
    x = 63,940.15

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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.