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Finding the Fourth Proportional to 201,003,181.80, 301,504,772.70 and 132,128,428.20

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Solution

The fourth proportional to 201,003,181.80, 301,504,772.70 and 132,128,428.20 is: 198,192,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,003,181.80 : 301,504,772.70 = 132,128,428.20 : x
  2. Step 2: Convert to fraction form
    201,003,181.80/301,504,772.70 = 132,128,428.20/x
  3. Step 3: Cross multiply
    201,003,181.80x = 301,504,772.70 × 132,128,428.20
  4. Step 4: Simplify right side
    201,003,181.80x = 39,837,351,711,649,272
  5. Step 5: Solve for x
    x = 39,837,351,711,649,272/201,003,181.80
  6. Step 6: Final answer
    x = 198,192,642.30

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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.