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Finding the Fourth Proportional to 128,368.62, 192,470.94 and 61,676.10

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Solution

The fourth proportional to 128,368.62, 192,470.94 and 61,676.10 is: 92,474.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.62 : 192,470.94 = 61,676.10 : x
  2. Step 2: Convert to fraction form
    128,368.62/192,470.94 = 61,676.10/x
  3. Step 3: Cross multiply
    128,368.62x = 192,470.94 × 61,676.10
  4. Step 4: Simplify right side
    128,368.62x = 11,870,856,942.53
  5. Step 5: Solve for x
    x = 11,870,856,942.53/128,368.62
  6. Step 6: Final answer
    x = 92,474.76

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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.