Home / 68,638.77-102,917.45-21,239.82

Finding the Fourth Proportional to 68,638.77, 102,917.45 and 21,239.82

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Solution

The fourth proportional to 68,638.77, 102,917.45 and 21,239.82 is: 31,847.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,638.77 : 102,917.45 = 21,239.82 : x
  2. Step 2: Convert to fraction form
    68,638.77/102,917.45 = 21,239.82/x
  3. Step 3: Cross multiply
    68,638.77x = 102,917.45 × 21,239.82
  4. Step 4: Simplify right side
    68,638.77x = 2,185,948,112.86
  5. Step 5: Solve for x
    x = 2,185,948,112.86/68,638.77
  6. Step 6: Final answer
    x = 31,847.13

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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.