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Finding the Fourth Proportional to 66,378.69, 99,586.48 and 28,942.03

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Solution

The fourth proportional to 66,378.69, 99,586.48 and 28,942.03 is: 43,421.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,378.69 : 99,586.48 = 28,942.03 : x
  2. Step 2: Convert to fraction form
    66,378.69/99,586.48 = 28,942.03/x
  3. Step 3: Cross multiply
    66,378.69x = 99,586.48 × 28,942.03
  4. Step 4: Simplify right side
    66,378.69x = 2,882,234,891.75
  5. Step 5: Solve for x
    x = 2,882,234,891.75/66,378.69
  6. Step 6: Final answer
    x = 43,421.09

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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.