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Finding the Fourth Proportional to 120,630.87, 181,064.70 and 100,767.95

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Solution

The fourth proportional to 120,630.87, 181,064.70 and 100,767.95 is: 151,250.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,630.87 : 181,064.70 = 100,767.95 : x
  2. Step 2: Convert to fraction form
    120,630.87/181,064.70 = 100,767.95/x
  3. Step 3: Cross multiply
    120,630.87x = 181,064.70 × 100,767.95
  4. Step 4: Simplify right side
    120,630.87x = 18,245,518,636.37
  5. Step 5: Solve for x
    x = 18,245,518,636.37/120,630.87
  6. Step 6: Final answer
    x = 151,250.83

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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.