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Finding the Fourth Proportional to 45,999.22, 68,998.94 and 12,721.05

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Solution

The fourth proportional to 45,999.22, 68,998.94 and 12,721.05 is: 19,081.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,999.22 : 68,998.94 = 12,721.05 : x
  2. Step 2: Convert to fraction form
    45,999.22/68,998.94 = 12,721.05/x
  3. Step 3: Cross multiply
    45,999.22x = 68,998.94 × 12,721.05
  4. Step 4: Simplify right side
    45,999.22x = 877,738,949.79
  5. Step 5: Solve for x
    x = 877,738,949.79/45,999.22
  6. Step 6: Final answer
    x = 19,081.61

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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.