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Finding the Fourth Proportional to 199,429.68, 299,143.70 and 81,100.02

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Solution

The fourth proportional to 199,429.68, 299,143.70 and 81,100.02 is: 121,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,429.68 : 299,143.70 = 81,100.02 : x
  2. Step 2: Convert to fraction form
    199,429.68/299,143.70 = 81,100.02/x
  3. Step 3: Cross multiply
    199,429.68x = 299,143.70 × 81,100.02
  4. Step 4: Simplify right side
    199,429.68x = 24,260,560,052.87
  5. Step 5: Solve for x
    x = 24,260,560,052.87/199,429.68
  6. Step 6: Final answer
    x = 121,649.70

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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.