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Finding the Fourth Proportional to 147,979, 204,211.02 and 80,911

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Solution

The fourth proportional to 147,979, 204,211.02 and 80,911 is: 111,657.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,979 : 204,211.02 = 80,911 : x
  2. Step 2: Convert to fraction form
    147,979/204,211.02 = 80,911/x
  3. Step 3: Cross multiply
    147,979x = 204,211.02 × 80,911
  4. Step 4: Simplify right side
    147,979x = 16,522,917,839.22
  5. Step 5: Solve for x
    x = 16,522,917,839.22/147,979
  6. Step 6: Final answer
    x = 111,657.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.