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Finding the Fourth Proportional to 78,229.08, 117,343.08 and 19,063.44

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Solution

The fourth proportional to 78,229.08, 117,343.08 and 19,063.44 is: 28,595.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,229.08 : 117,343.08 = 19,063.44 : x
  2. Step 2: Convert to fraction form
    78,229.08/117,343.08 = 19,063.44/x
  3. Step 3: Cross multiply
    78,229.08x = 117,343.08 × 19,063.44
  4. Step 4: Simplify right side
    78,229.08x = 2,236,962,765.00
  5. Step 5: Solve for x
    x = 2,236,962,765.00/78,229.08
  6. Step 6: Final answer
    x = 28,595.03

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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.