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Finding the Fourth Proportional to 87,570.70, 120,850.10 and 53,578.64

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Solution

The fourth proportional to 87,570.70, 120,850.10 and 53,578.64 is: 73,940.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,570.70 : 120,850.10 = 53,578.64 : x
  2. Step 2: Convert to fraction form
    87,570.70/120,850.10 = 53,578.64/x
  3. Step 3: Cross multiply
    87,570.70x = 120,850.10 × 53,578.64
  4. Step 4: Simplify right side
    87,570.70x = 6,474,984,001.86
  5. Step 5: Solve for x
    x = 6,474,984,001.86/87,570.70
  6. Step 6: Final answer
    x = 73,940.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.