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Finding the Fourth Proportional to 202,129.80, 303,194.70 and 68,990.10

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Solution

The fourth proportional to 202,129.80, 303,194.70 and 68,990.10 is: 103,485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,129.80 : 303,194.70 = 68,990.10 : x
  2. Step 2: Convert to fraction form
    202,129.80/303,194.70 = 68,990.10/x
  3. Step 3: Cross multiply
    202,129.80x = 303,194.70 × 68,990.10
  4. Step 4: Simplify right side
    202,129.80x = 20,917,432,672.47
  5. Step 5: Solve for x
    x = 20,917,432,672.47/202,129.80
  6. Step 6: Final answer
    x = 103,485.15

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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.