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Finding the Fourth Proportional to 71,644.60, 107,467.80 and 21,725.20

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Solution

The fourth proportional to 71,644.60, 107,467.80 and 21,725.20 is: 32,588.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,644.60 : 107,467.80 = 21,725.20 : x
  2. Step 2: Convert to fraction form
    71,644.60/107,467.80 = 21,725.20/x
  3. Step 3: Cross multiply
    71,644.60x = 107,467.80 × 21,725.20
  4. Step 4: Simplify right side
    71,644.60x = 2,334,759,448.56
  5. Step 5: Solve for x
    x = 2,334,759,448.56/71,644.60
  6. Step 6: Final answer
    x = 32,588.07

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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.