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Finding the Fourth Proportional to 65,978,126.80, 99,014,429.40 and 27,667,135.60

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Solution

The fourth proportional to 65,978,126.80, 99,014,429.40 and 27,667,135.60 is: 41,520,512.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,978,126.80 : 99,014,429.40 = 27,667,135.60 : x
  2. Step 2: Convert to fraction form
    65,978,126.80/99,014,429.40 = 27,667,135.60/x
  3. Step 3: Cross multiply
    65,978,126.80x = 99,014,429.40 × 27,667,135.60
  4. Step 4: Simplify right side
    65,978,126.80x = 2,739,445,644,566,427
  5. Step 5: Solve for x
    x = 2,739,445,644,566,427/65,978,126.80
  6. Step 6: Final answer
    x = 41,520,512.59

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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.