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Finding the Fourth Proportional to 87,989.58, 121,424.13 and 49,748.49

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Solution

The fourth proportional to 87,989.58, 121,424.13 and 49,748.49 is: 68,652.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,989.58 : 121,424.13 = 49,748.49 : x
  2. Step 2: Convert to fraction form
    87,989.58/121,424.13 = 49,748.49/x
  3. Step 3: Cross multiply
    87,989.58x = 121,424.13 × 49,748.49
  4. Step 4: Simplify right side
    87,989.58x = 6,040,667,117.06
  5. Step 5: Solve for x
    x = 6,040,667,117.06/87,989.58
  6. Step 6: Final answer
    x = 68,652.07

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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.