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Finding the Fourth Proportional to 199,781.02, 299,674.13 and 66,661.28

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Solution

The fourth proportional to 199,781.02, 299,674.13 and 66,661.28 is: 99,992.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,781.02 : 299,674.13 = 66,661.28 : x
  2. Step 2: Convert to fraction form
    199,781.02/299,674.13 = 66,661.28/x
  3. Step 3: Cross multiply
    199,781.02x = 299,674.13 × 66,661.28
  4. Step 4: Simplify right side
    199,781.02x = 19,976,660,006.19
  5. Step 5: Solve for x
    x = 19,976,660,006.19/199,781.02
  6. Step 6: Final answer
    x = 99,992.78

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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.