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Finding the Fourth Proportional to 43,172.88, 64,720.90 and 16,871.64

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Solution

The fourth proportional to 43,172.88, 64,720.90 and 16,871.64 is: 25,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,172.88 : 64,720.90 = 16,871.64 : x
  2. Step 2: Convert to fraction form
    43,172.88/64,720.90 = 16,871.64/x
  3. Step 3: Cross multiply
    43,172.88x = 64,720.90 × 16,871.64
  4. Step 4: Simplify right side
    43,172.88x = 1,091,947,725.28
  5. Step 5: Solve for x
    x = 1,091,947,725.28/43,172.88
  6. Step 6: Final answer
    x = 25,292.45

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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.