Home / 129,257.85-178,375.82-72,669.63

Finding the Fourth Proportional to 129,257.85, 178,375.82 and 72,669.63

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Solution

The fourth proportional to 129,257.85, 178,375.82 and 72,669.63 is: 100,284.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,257.85 : 178,375.82 = 72,669.63 : x
  2. Step 2: Convert to fraction form
    129,257.85/178,375.82 = 72,669.63/x
  3. Step 3: Cross multiply
    129,257.85x = 178,375.82 × 72,669.63
  4. Step 4: Simplify right side
    129,257.85x = 12,962,504,840.35
  5. Step 5: Solve for x
    x = 12,962,504,840.35/129,257.85
  6. Step 6: Final answer
    x = 100,284.08

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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.