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Finding the Fourth Proportional to 199,129.40, 298,687.70 and 66,015.80

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Solution

The fourth proportional to 199,129.40, 298,687.70 and 66,015.80 is: 99,021.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,129.40 : 298,687.70 = 66,015.80 : x
  2. Step 2: Convert to fraction form
    199,129.40/298,687.70 = 66,015.80/x
  3. Step 3: Cross multiply
    199,129.40x = 298,687.70 × 66,015.80
  4. Step 4: Simplify right side
    199,129.40x = 19,718,107,465.66
  5. Step 5: Solve for x
    x = 19,718,107,465.66/199,129.40
  6. Step 6: Final answer
    x = 99,021.58

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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.