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Finding the Fourth Proportional to 87,103.77, 120,188.64 and 51,300.87

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Solution

The fourth proportional to 87,103.77, 120,188.64 and 51,300.87 is: 70,786.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,103.77 : 120,188.64 = 51,300.87 : x
  2. Step 2: Convert to fraction form
    87,103.77/120,188.64 = 51,300.87/x
  3. Step 3: Cross multiply
    87,103.77x = 120,188.64 × 51,300.87
  4. Step 4: Simplify right side
    87,103.77x = 6,165,781,442.97
  5. Step 5: Solve for x
    x = 6,165,781,442.97/87,103.77
  6. Step 6: Final answer
    x = 70,786.62

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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.