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Finding the Fourth Proportional to 80,636.96, 120,975.89 and 56,991.03

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Solution

The fourth proportional to 80,636.96, 120,975.89 and 56,991.03 is: 85,501.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,636.96 : 120,975.89 = 56,991.03 : x
  2. Step 2: Convert to fraction form
    80,636.96/120,975.89 = 56,991.03/x
  3. Step 3: Cross multiply
    80,636.96x = 120,975.89 × 56,991.03
  4. Step 4: Simplify right side
    80,636.96x = 6,894,540,576.27
  5. Step 5: Solve for x
    x = 6,894,540,576.27/80,636.96
  6. Step 6: Final answer
    x = 85,501.00

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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.