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Finding the Fourth Proportional to 99,519.93, 149,288.31 and 28,442.97

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Solution

The fourth proportional to 99,519.93, 149,288.31 and 28,442.97 is: 42,666.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,519.93 : 149,288.31 = 28,442.97 : x
  2. Step 2: Convert to fraction form
    99,519.93/149,288.31 = 28,442.97/x
  3. Step 3: Cross multiply
    99,519.93x = 149,288.31 × 28,442.97
  4. Step 4: Simplify right side
    99,519.93x = 4,246,202,922.68
  5. Step 5: Solve for x
    x = 4,246,202,922.68/99,519.93
  6. Step 6: Final answer
    x = 42,666.86

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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.