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Finding the Fourth Proportional to 120,883.59, 166,793.99 and 73,140.57

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Solution

The fourth proportional to 120,883.59, 166,793.99 and 73,140.57 is: 100,918.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,883.59 : 166,793.99 = 73,140.57 : x
  2. Step 2: Convert to fraction form
    120,883.59/166,793.99 = 73,140.57/x
  3. Step 3: Cross multiply
    120,883.59x = 166,793.99 × 73,140.57
  4. Step 4: Simplify right side
    120,883.59x = 12,199,407,135.47
  5. Step 5: Solve for x
    x = 12,199,407,135.47/120,883.59
  6. Step 6: Final answer
    x = 100,918.64

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1.5x scale

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.