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Finding the Fourth Proportional to 172,628.68, 258,973.38 and 71,426.44

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Solution

The fourth proportional to 172,628.68, 258,973.38 and 71,426.44 is: 107,152.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,628.68 : 258,973.38 = 71,426.44 : x
  2. Step 2: Convert to fraction form
    172,628.68/258,973.38 = 71,426.44/x
  3. Step 3: Cross multiply
    172,628.68x = 258,973.38 × 71,426.44
  4. Step 4: Simplify right side
    172,628.68x = 18,497,546,588.17
  5. Step 5: Solve for x
    x = 18,497,546,588.17/172,628.68
  6. Step 6: Final answer
    x = 107,152.22

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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.