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Finding the Fourth Proportional to 172,342.80, 258,408.36 and 67,039.20

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Solution

The fourth proportional to 172,342.80, 258,408.36 and 67,039.20 is: 100,517.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,342.80 : 258,408.36 = 67,039.20 : x
  2. Step 2: Convert to fraction form
    172,342.80/258,408.36 = 67,039.20/x
  3. Step 3: Cross multiply
    172,342.80x = 258,408.36 × 67,039.20
  4. Step 4: Simplify right side
    172,342.80x = 17,323,489,727.71
  5. Step 5: Solve for x
    x = 17,323,489,727.71/172,342.80
  6. Step 6: Final answer
    x = 100,517.63

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1.5x scale

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.