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Finding the Fourth Proportional to 87,551.16, 120,815.64 and 51,744.50

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Solution

The fourth proportional to 87,551.16, 120,815.64 and 51,744.50 is: 71,404.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,551.16 : 120,815.64 = 51,744.50 : x
  2. Step 2: Convert to fraction form
    87,551.16/120,815.64 = 51,744.50/x
  3. Step 3: Cross multiply
    87,551.16x = 120,815.64 × 51,744.50
  4. Step 4: Simplify right side
    87,551.16x = 6,251,544,883.98
  5. Step 5: Solve for x
    x = 6,251,544,883.98/87,551.16
  6. Step 6: Final answer
    x = 71,404.48

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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.