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Finding the Fourth Proportional to 87,730.79, 120,926.30 and 68,576.72

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Solution

The fourth proportional to 87,730.79, 120,926.30 and 68,576.72 is: 94,524.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,730.79 : 120,926.30 = 68,576.72 : x
  2. Step 2: Convert to fraction form
    87,730.79/120,926.30 = 68,576.72/x
  3. Step 3: Cross multiply
    87,730.79x = 120,926.30 × 68,576.72
  4. Step 4: Simplify right side
    87,730.79x = 8,292,729,489.49
  5. Step 5: Solve for x
    x = 8,292,729,489.49/87,730.79
  6. Step 6: Final answer
    x = 94,524.73

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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.