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Finding the Fourth Proportional to 87,403, 120,616.16 and 49,679.68

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Solution

The fourth proportional to 87,403, 120,616.16 and 49,679.68 is: 68,557.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,403 : 120,616.16 = 49,679.68 : x
  2. Step 2: Convert to fraction form
    87,403/120,616.16 = 49,679.68/x
  3. Step 3: Cross multiply
    87,403x = 120,616.16 × 49,679.68
  4. Step 4: Simplify right side
    87,403x = 5,992,172,231.63
  5. Step 5: Solve for x
    x = 5,992,172,231.63/87,403
  6. Step 6: Final answer
    x = 68,557.97

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1.5x scale

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.