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Finding the Fourth Proportional to 425,803.73, 638,717.11 and 105,942.67

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Solution

The fourth proportional to 425,803.73, 638,717.11 and 105,942.67 is: 158,916.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,803.73 : 638,717.11 = 105,942.67 : x
  2. Step 2: Convert to fraction form
    425,803.73/638,717.11 = 105,942.67/x
  3. Step 3: Cross multiply
    425,803.73x = 638,717.11 × 105,942.67
  4. Step 4: Simplify right side
    425,803.73x = 67,667,394,146.43
  5. Step 5: Solve for x
    x = 67,667,394,146.43/425,803.73
  6. Step 6: Final answer
    x = 158,916.87

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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.