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Finding the Fourth Proportional to 81,645,608.60, 122,468,412.90 and 75,410,034.20

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Solution

The fourth proportional to 81,645,608.60, 122,468,412.90 and 75,410,034.20 is: 113,115,051.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,645,608.60 : 122,468,412.90 = 75,410,034.20 : x
  2. Step 2: Convert to fraction form
    81,645,608.60/122,468,412.90 = 75,410,034.20/x
  3. Step 3: Cross multiply
    81,645,608.60x = 122,468,412.90 × 75,410,034.20
  4. Step 4: Simplify right side
    81,645,608.60x = 9,235,347,205,208,722
  5. Step 5: Solve for x
    x = 9,235,347,205,208,722/81,645,608.60
  6. Step 6: Final answer
    x = 113,115,051.30

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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.