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Finding the Fourth Proportional to 213,279.60, 319,673.32 and 80,074.90

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Solution

The fourth proportional to 213,279.60, 319,673.32 and 80,074.90 is: 120,019.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,279.60 : 319,673.32 = 80,074.90 : x
  2. Step 2: Convert to fraction form
    213,279.60/319,673.32 = 80,074.90/x
  3. Step 3: Cross multiply
    213,279.60x = 319,673.32 × 80,074.90
  4. Step 4: Simplify right side
    213,279.60x = 25,597,809,131.67
  5. Step 5: Solve for x
    x = 25,597,809,131.67/213,279.60
  6. Step 6: Final answer
    x = 120,019.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.