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Finding the Fourth Proportional to 80,587.96, 120,881.79 and 21,423.62

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Solution

The fourth proportional to 80,587.96, 120,881.79 and 21,423.62 is: 32,135.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,587.96 : 120,881.79 = 21,423.62 : x
  2. Step 2: Convert to fraction form
    80,587.96/120,881.79 = 21,423.62/x
  3. Step 3: Cross multiply
    80,587.96x = 120,881.79 × 21,423.62
  4. Step 4: Simplify right side
    80,587.96x = 2,589,725,836.08
  5. Step 5: Solve for x
    x = 2,589,725,836.08/80,587.96
  6. Step 6: Final answer
    x = 32,135.39

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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.