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Finding the Fourth Proportional to 80,481.50, 120,620.49 and 70,461.71

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Solution

The fourth proportional to 80,481.50, 120,620.49 and 70,461.71 is: 105,603.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,481.50 : 120,620.49 = 70,461.71 : x
  2. Step 2: Convert to fraction form
    80,481.50/120,620.49 = 70,461.71/x
  3. Step 3: Cross multiply
    80,481.50x = 120,620.49 × 70,461.71
  4. Step 4: Simplify right side
    80,481.50x = 8,499,125,383.34
  5. Step 5: Solve for x
    x = 8,499,125,383.34/80,481.50
  6. Step 6: Final answer
    x = 105,603.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.