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Finding the Fourth Proportional to 120,453.75, 166,230.54 and 72,697.77

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Solution

The fourth proportional to 120,453.75, 166,230.54 and 72,697.77 is: 100,325.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,453.75 : 166,230.54 = 72,697.77 : x
  2. Step 2: Convert to fraction form
    120,453.75/166,230.54 = 72,697.77/x
  3. Step 3: Cross multiply
    120,453.75x = 166,230.54 × 72,697.77
  4. Step 4: Simplify right side
    120,453.75x = 12,084,589,563.90
  5. Step 5: Solve for x
    x = 12,084,589,563.90/120,453.75
  6. Step 6: Final answer
    x = 100,325.56

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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.