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Finding the Fourth Proportional to 172,270.40, 258,385.09 and 45,920.12

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Solution

The fourth proportional to 172,270.40, 258,385.09 and 45,920.12 is: 68,874.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,270.40 : 258,385.09 = 45,920.12 : x
  2. Step 2: Convert to fraction form
    172,270.40/258,385.09 = 45,920.12/x
  3. Step 3: Cross multiply
    172,270.40x = 258,385.09 × 45,920.12
  4. Step 4: Simplify right side
    172,270.40x = 11,865,073,018.39
  5. Step 5: Solve for x
    x = 11,865,073,018.39/172,270.40
  6. Step 6: Final answer
    x = 68,874.71

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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.