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Finding the Fourth Proportional to 423,163.08, 634,803.82 and 123,665.56

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Solution

The fourth proportional to 423,163.08, 634,803.82 and 123,665.56 is: 185,515.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,163.08 : 634,803.82 = 123,665.56 : x
  2. Step 2: Convert to fraction form
    423,163.08/634,803.82 = 123,665.56/x
  3. Step 3: Cross multiply
    423,163.08x = 634,803.82 × 123,665.56
  4. Step 4: Simplify right side
    423,163.08x = 78,503,369,890.44
  5. Step 5: Solve for x
    x = 78,503,369,890.44/423,163.08
  6. Step 6: Final answer
    x = 185,515.64

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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.