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Finding the Fourth Proportional to 80,641.46, 120,982.64 and 56,995.54

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Solution

The fourth proportional to 80,641.46, 120,982.64 and 56,995.54 is: 85,507.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,641.46 : 120,982.64 = 56,995.54 : x
  2. Step 2: Convert to fraction form
    80,641.46/120,982.64 = 56,995.54/x
  3. Step 3: Cross multiply
    80,641.46x = 120,982.64 × 56,995.54
  4. Step 4: Simplify right side
    80,641.46x = 6,895,470,897.43
  5. Step 5: Solve for x
    x = 6,895,470,897.43/80,641.46
  6. Step 6: Final answer
    x = 85,507.76

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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.