Home / 129,805.75-179,131.94-70,189.75

Finding the Fourth Proportional to 129,805.75, 179,131.94 and 70,189.75

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Solution

The fourth proportional to 129,805.75, 179,131.94 and 70,189.75 is: 96,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,805.75 : 179,131.94 = 70,189.75 : x
  2. Step 2: Convert to fraction form
    129,805.75/179,131.94 = 70,189.75/x
  3. Step 3: Cross multiply
    129,805.75x = 179,131.94 × 70,189.75
  4. Step 4: Simplify right side
    129,805.75x = 12,573,226,085.62
  5. Step 5: Solve for x
    x = 12,573,226,085.62/129,805.75
  6. Step 6: Final answer
    x = 96,861.86

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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.