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Finding the Fourth Proportional to 202,971.20, 304,456.80 and 53,211.20

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Solution

The fourth proportional to 202,971.20, 304,456.80 and 53,211.20 is: 79,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,971.20 : 304,456.80 = 53,211.20 : x
  2. Step 2: Convert to fraction form
    202,971.20/304,456.80 = 53,211.20/x
  3. Step 3: Cross multiply
    202,971.20x = 304,456.80 × 53,211.20
  4. Step 4: Simplify right side
    202,971.20x = 16,200,511,676.16
  5. Step 5: Solve for x
    x = 16,200,511,676.16/202,971.20
  6. Step 6: Final answer
    x = 79,816.80

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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.