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Finding the Fourth Proportional to 172,497,958.80, 258,619,314.60 and 81,515,259.60

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Solution

The fourth proportional to 172,497,958.80, 258,619,314.60 and 81,515,259.60 is: 122,212,579.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,497,958.80 : 258,619,314.60 = 81,515,259.60 : x
  2. Step 2: Convert to fraction form
    172,497,958.80/258,619,314.60 = 81,515,259.60/x
  3. Step 3: Cross multiply
    172,497,958.80x = 258,619,314.60 × 81,515,259.60
  4. Step 4: Simplify right side
    172,497,958.80x = 21,081,420,567,193,068
  5. Step 5: Solve for x
    x = 21,081,420,567,193,068/172,497,958.80
  6. Step 6: Final answer
    x = 122,212,579.87

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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.