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Finding the Fourth Proportional to 80,703.96, 120,701.88 and 71,881.44

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Solution

The fourth proportional to 80,703.96, 120,701.88 and 71,881.44 is: 107,506.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,703.96 : 120,701.88 = 71,881.44 : x
  2. Step 2: Convert to fraction form
    80,703.96/120,701.88 = 71,881.44/x
  3. Step 3: Cross multiply
    80,703.96x = 120,701.88 × 71,881.44
  4. Step 4: Simplify right side
    80,703.96x = 8,676,224,945.11
  5. Step 5: Solve for x
    x = 8,676,224,945.11/80,703.96
  6. Step 6: Final answer
    x = 107,506.81

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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.