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Finding the Fourth Proportional to 71,628.81, 107,464.70 and 28,912.26

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Solution

The fourth proportional to 71,628.81, 107,464.70 and 28,912.26 is: 43,377.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,628.81 : 107,464.70 = 28,912.26 : x
  2. Step 2: Convert to fraction form
    71,628.81/107,464.70 = 28,912.26/x
  3. Step 3: Cross multiply
    71,628.81x = 107,464.70 × 28,912.26
  4. Step 4: Simplify right side
    71,628.81x = 3,107,047,136.69
  5. Step 5: Solve for x
    x = 3,107,047,136.69/71,628.81
  6. Step 6: Final answer
    x = 43,377.06

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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.