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Finding the Fourth Proportional to 89,940.99, 124,115.31 and 49,653.90

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Solution

The fourth proportional to 89,940.99, 124,115.31 and 49,653.90 is: 68,520.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,940.99 : 124,115.31 = 49,653.90 : x
  2. Step 2: Convert to fraction form
    89,940.99/124,115.31 = 49,653.90/x
  3. Step 3: Cross multiply
    89,940.99x = 124,115.31 × 49,653.90
  4. Step 4: Simplify right side
    89,940.99x = 6,162,809,191.21
  5. Step 5: Solve for x
    x = 6,162,809,191.21/89,940.99
  6. Step 6: Final answer
    x = 68,520.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.