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Finding the Fourth Proportional to 71,321.65, 106,889.69 and 29,153.52

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Solution

The fourth proportional to 71,321.65, 106,889.69 and 29,153.52 is: 43,692.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,321.65 : 106,889.69 = 29,153.52 : x
  2. Step 2: Convert to fraction form
    71,321.65/106,889.69 = 29,153.52/x
  3. Step 3: Cross multiply
    71,321.65x = 106,889.69 × 29,153.52
  4. Step 4: Simplify right side
    71,321.65x = 3,116,210,788.09
  5. Step 5: Solve for x
    x = 3,116,210,788.09/71,321.65
  6. Step 6: Final answer
    x = 43,692.36

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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.