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Finding the Fourth Proportional to 120,780.99, 166,693.15 and 73,034.68

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Solution

The fourth proportional to 120,780.99, 166,693.15 and 73,034.68 is: 100,797.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,780.99 : 166,693.15 = 73,034.68 : x
  2. Step 2: Convert to fraction form
    120,780.99/166,693.15 = 73,034.68/x
  3. Step 3: Cross multiply
    120,780.99x = 166,693.15 × 73,034.68
  4. Step 4: Simplify right side
    120,780.99x = 12,174,380,503.27
  5. Step 5: Solve for x
    x = 12,174,380,503.27/120,780.99
  6. Step 6: Final answer
    x = 100,797.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.