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Finding the Fourth Proportional to 87,393.80, 120,588.54 and 49,143.44

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Solution

The fourth proportional to 87,393.80, 120,588.54 and 49,143.44 is: 67,809.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,393.80 : 120,588.54 = 49,143.44 : x
  2. Step 2: Convert to fraction form
    87,393.80/120,588.54 = 49,143.44/x
  3. Step 3: Cross multiply
    87,393.80x = 120,588.54 × 49,143.44
  4. Step 4: Simplify right side
    87,393.80x = 5,926,135,680.18
  5. Step 5: Solve for x
    x = 5,926,135,680.18/87,393.80
  6. Step 6: Final answer
    x = 67,809.57

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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.