Home / 68,712.45-103,083.39-21,326.55

Finding the Fourth Proportional to 68,712.45, 103,083.39 and 21,326.55

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Solution

The fourth proportional to 68,712.45, 103,083.39 and 21,326.55 is: 31,994.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,712.45 : 103,083.39 = 21,326.55 : x
  2. Step 2: Convert to fraction form
    68,712.45/103,083.39 = 21,326.55/x
  3. Step 3: Cross multiply
    68,712.45x = 103,083.39 × 21,326.55
  4. Step 4: Simplify right side
    68,712.45x = 2,198,413,071.00
  5. Step 5: Solve for x
    x = 2,198,413,071.00/68,712.45
  6. Step 6: Final answer
    x = 31,994.39

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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.