Home / 120,629.80-180,944.70-76,306.60

Finding the Fourth Proportional to 120,629.80, 180,944.70 and 76,306.60

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Solution

The fourth proportional to 120,629.80, 180,944.70 and 76,306.60 is: 114,459.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,629.80 : 180,944.70 = 76,306.60 : x
  2. Step 2: Convert to fraction form
    120,629.80/180,944.70 = 76,306.60/x
  3. Step 3: Cross multiply
    120,629.80x = 180,944.70 × 76,306.60
  4. Step 4: Simplify right side
    120,629.80x = 13,807,274,845.02
  5. Step 5: Solve for x
    x = 13,807,274,845.02/120,629.80
  6. Step 6: Final answer
    x = 114,459.90

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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.