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Finding the Fourth Proportional to 199,370.60, 298,710.30 and 129,213.80

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Solution

The fourth proportional to 199,370.60, 298,710.30 and 129,213.80 is: 193,596.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,370.60 : 298,710.30 = 129,213.80 : x
  2. Step 2: Convert to fraction form
    199,370.60/298,710.30 = 129,213.80/x
  3. Step 3: Cross multiply
    199,370.60x = 298,710.30 × 129,213.80
  4. Step 4: Simplify right side
    199,370.60x = 38,597,492,962.14
  5. Step 5: Solve for x
    x = 38,597,492,962.14/199,370.60
  6. Step 6: Final answer
    x = 193,596.71

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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.