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Finding the Fourth Proportional to 199,988.84, 299,999.20 and 66,869.94

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Solution

The fourth proportional to 199,988.84, 299,999.20 and 66,869.94 is: 100,310.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,988.84 : 299,999.20 = 66,869.94 : x
  2. Step 2: Convert to fraction form
    199,988.84/299,999.20 = 66,869.94/x
  3. Step 3: Cross multiply
    199,988.84x = 299,999.20 × 66,869.94
  4. Step 4: Simplify right side
    199,988.84x = 20,060,928,504.05
  5. Step 5: Solve for x
    x = 20,060,928,504.05/199,988.84
  6. Step 6: Final answer
    x = 100,310.24

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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.