Home / 129,314.35-178,452.09-72,725.73

Finding the Fourth Proportional to 129,314.35, 178,452.09 and 72,725.73

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Solution

The fourth proportional to 129,314.35, 178,452.09 and 72,725.73 is: 100,360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,314.35 : 178,452.09 = 72,725.73 : x
  2. Step 2: Convert to fraction form
    129,314.35/178,452.09 = 72,725.73/x
  3. Step 3: Cross multiply
    129,314.35x = 178,452.09 × 72,725.73
  4. Step 4: Simplify right side
    129,314.35x = 12,978,058,515.28
  5. Step 5: Solve for x
    x = 12,978,058,515.28/129,314.35
  6. Step 6: Final answer
    x = 100,360.54

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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.