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Finding the Fourth Proportional to 80,680.69, 120,886.44 and 56,949.31

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Solution

The fourth proportional to 80,680.69, 120,886.44 and 56,949.31 is: 85,328.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,680.69 : 120,886.44 = 56,949.31 : x
  2. Step 2: Convert to fraction form
    80,680.69/120,886.44 = 56,949.31/x
  3. Step 3: Cross multiply
    80,680.69x = 120,886.44 × 56,949.31
  4. Step 4: Simplify right side
    80,680.69x = 6,884,399,346.36
  5. Step 5: Solve for x
    x = 6,884,399,346.36/80,680.69
  6. Step 6: Final answer
    x = 85,328.96

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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.