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Finding the Fourth Proportional to 201,108,987.60, 301,663,481.40 and 79,940,439.60

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Solution

The fourth proportional to 201,108,987.60, 301,663,481.40 and 79,940,439.60 is: 119,910,659.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,108,987.60 : 301,663,481.40 = 79,940,439.60 : x
  2. Step 2: Convert to fraction form
    201,108,987.60/301,663,481.40 = 79,940,439.60/x
  3. Step 3: Cross multiply
    201,108,987.60x = 301,663,481.40 × 79,940,439.60
  4. Step 4: Simplify right side
    201,108,987.60x = 24,115,111,314,382,420
  5. Step 5: Solve for x
    x = 24,115,111,314,382,420/201,108,987.60
  6. Step 6: Final answer
    x = 119,910,659.40

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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.