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Finding the Fourth Proportional to 99,129.82, 148,694.93 and 69,679.44

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Solution

The fourth proportional to 99,129.82, 148,694.93 and 69,679.44 is: 104,519.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,129.82 : 148,694.93 = 69,679.44 : x
  2. Step 2: Convert to fraction form
    99,129.82/148,694.93 = 69,679.44/x
  3. Step 3: Cross multiply
    99,129.82x = 148,694.93 × 69,679.44
  4. Step 4: Simplify right side
    99,129.82x = 10,360,979,453.24
  5. Step 5: Solve for x
    x = 10,360,979,453.24/99,129.82
  6. Step 6: Final answer
    x = 104,519.30

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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.