Home / 87,631.28-120,789.49-68,477.77

Finding the Fourth Proportional to 87,631.28, 120,789.49 and 68,477.77

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Solution

The fourth proportional to 87,631.28, 120,789.49 and 68,477.77 is: 94,388.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,631.28 : 120,789.49 = 68,477.77 : x
  2. Step 2: Convert to fraction form
    87,631.28/120,789.49 = 68,477.77/x
  3. Step 3: Cross multiply
    87,631.28x = 120,789.49 × 68,477.77
  4. Step 4: Simplify right side
    87,631.28x = 8,271,394,698.26
  5. Step 5: Solve for x
    x = 8,271,394,698.26/87,631.28
  6. Step 6: Final answer
    x = 94,388.62

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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.