Home / 129,729.75-179,027.24-72,372.78

Finding the Fourth Proportional to 129,729.75, 179,027.24 and 72,372.78

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Solution

The fourth proportional to 129,729.75, 179,027.24 and 72,372.78 is: 99,874.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,729.75 : 179,027.24 = 72,372.78 : x
  2. Step 2: Convert to fraction form
    129,729.75/179,027.24 = 72,372.78/x
  3. Step 3: Cross multiply
    129,729.75x = 179,027.24 × 72,372.78
  4. Step 4: Simplify right side
    129,729.75x = 12,956,698,692.66
  5. Step 5: Solve for x
    x = 12,956,698,692.66/129,729.75
  6. Step 6: Final answer
    x = 99,874.54

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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.