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Finding the Fourth Proportional to 81,181.20, 121,714.20 and 36,829.20

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Solution

The fourth proportional to 81,181.20, 121,714.20 and 36,829.20 is: 55,217.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,181.20 : 121,714.20 = 36,829.20 : x
  2. Step 2: Convert to fraction form
    81,181.20/121,714.20 = 36,829.20/x
  3. Step 3: Cross multiply
    81,181.20x = 121,714.20 × 36,829.20
  4. Step 4: Simplify right side
    81,181.20x = 4,482,636,614.64
  5. Step 5: Solve for x
    x = 4,482,636,614.64/81,181.20
  6. Step 6: Final answer
    x = 55,217.67

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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.