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Finding the Fourth Proportional to 64,511.96, 96,770.51 and 20,138.72

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Solution

The fourth proportional to 64,511.96, 96,770.51 and 20,138.72 is: 30,208.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,511.96 : 96,770.51 = 20,138.72 : x
  2. Step 2: Convert to fraction form
    64,511.96/96,770.51 = 20,138.72/x
  3. Step 3: Cross multiply
    64,511.96x = 96,770.51 × 20,138.72
  4. Step 4: Simplify right side
    64,511.96x = 1,948,834,205.15
  5. Step 5: Solve for x
    x = 1,948,834,205.15/64,511.96
  6. Step 6: Final answer
    x = 30,208.88

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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.