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Finding the Fourth Proportional to 107,920.80, 161,811.12 and 51,759.60

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Solution

The fourth proportional to 107,920.80, 161,811.12 and 51,759.60 is: 77,605.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,920.80 : 161,811.12 = 51,759.60 : x
  2. Step 2: Convert to fraction form
    107,920.80/161,811.12 = 51,759.60/x
  3. Step 3: Cross multiply
    107,920.80x = 161,811.12 × 51,759.60
  4. Step 4: Simplify right side
    107,920.80x = 8,375,278,846.75
  5. Step 5: Solve for x
    x = 8,375,278,846.75/107,920.80
  6. Step 6: Final answer
    x = 77,605.79

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1.5x scale

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.