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Finding the Fourth Proportional to 79,828, 119,741.52 and 20,663.44

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Solution

The fourth proportional to 79,828, 119,741.52 and 20,663.44 is: 30,995.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,828 : 119,741.52 = 20,663.44 : x
  2. Step 2: Convert to fraction form
    79,828/119,741.52 = 20,663.44/x
  3. Step 3: Cross multiply
    79,828x = 119,741.52 × 20,663.44
  4. Step 4: Simplify right side
    79,828x = 2,474,271,714.03
  5. Step 5: Solve for x
    x = 2,474,271,714.03/79,828
  6. Step 6: Final answer
    x = 30,995.04

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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.