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Finding the Fourth Proportional to 105,794.92, 145,974.18 and 61,057

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Solution

The fourth proportional to 105,794.92, 145,974.18 and 61,057 is: 84,245.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,794.92 : 145,974.18 = 61,057 : x
  2. Step 2: Convert to fraction form
    105,794.92/145,974.18 = 61,057/x
  3. Step 3: Cross multiply
    105,794.92x = 145,974.18 × 61,057
  4. Step 4: Simplify right side
    105,794.92x = 8,912,745,508.26
  5. Step 5: Solve for x
    x = 8,912,745,508.26/105,794.92
  6. Step 6: Final answer
    x = 84,245.50

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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.