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Finding the Fourth Proportional to 99,485.44, 149,228 and 68,225.92

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Solution

The fourth proportional to 99,485.44, 149,228 and 68,225.92 is: 102,338.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,485.44 : 149,228 = 68,225.92 : x
  2. Step 2: Convert to fraction form
    99,485.44/149,228 = 68,225.92/x
  3. Step 3: Cross multiply
    99,485.44x = 149,228 × 68,225.92
  4. Step 4: Simplify right side
    99,485.44x = 10,181,217,589.76
  5. Step 5: Solve for x
    x = 10,181,217,589.76/99,485.44
  6. Step 6: Final answer
    x = 102,338.77

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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.