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Finding the Fourth Proportional to 85,978,364.85, 128,984,556.56 and 24,568,078.77

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Solution

The fourth proportional to 85,978,364.85, 128,984,556.56 and 24,568,078.77 is: 36,856,978.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,978,364.85 : 128,984,556.56 = 24,568,078.77 : x
  2. Step 2: Convert to fraction form
    85,978,364.85/128,984,556.56 = 24,568,078.77/x
  3. Step 3: Cross multiply
    85,978,364.85x = 128,984,556.56 × 24,568,078.77
  4. Step 4: Simplify right side
    85,978,364.85x = 3,168,902,745,556,760
  5. Step 5: Solve for x
    x = 3,168,902,745,556,760/85,978,364.85
  6. Step 6: Final answer
    x = 36,856,978.51

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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.