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Finding the Fourth Proportional to 204,072.90, 305,963.55 and 91,661.10

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Solution

The fourth proportional to 204,072.90, 305,963.55 and 91,661.10 is: 137,426.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,072.90 : 305,963.55 = 91,661.10 : x
  2. Step 2: Convert to fraction form
    204,072.90/305,963.55 = 91,661.10/x
  3. Step 3: Cross multiply
    204,072.90x = 305,963.55 × 91,661.10
  4. Step 4: Simplify right side
    204,072.90x = 28,044,955,552.91
  5. Step 5: Solve for x
    x = 28,044,955,552.91/204,072.90
  6. Step 6: Final answer
    x = 137,426.16

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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.