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Finding the Fourth Proportional to 202,116.80, 303,175.20 and 127,321.40

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Solution

The fourth proportional to 202,116.80, 303,175.20 and 127,321.40 is: 190,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,116.80 : 303,175.20 = 127,321.40 : x
  2. Step 2: Convert to fraction form
    202,116.80/303,175.20 = 127,321.40/x
  3. Step 3: Cross multiply
    202,116.80x = 303,175.20 × 127,321.40
  4. Step 4: Simplify right side
    202,116.80x = 38,600,690,909.28
  5. Step 5: Solve for x
    x = 38,600,690,909.28/202,116.80
  6. Step 6: Final answer
    x = 190,982.10

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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.