Home / 68,724.70-103,087.06-18,802.78

Finding the Fourth Proportional to 68,724.70, 103,087.06 and 18,802.78

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Solution

The fourth proportional to 68,724.70, 103,087.06 and 18,802.78 is: 28,204.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,724.70 : 103,087.06 = 18,802.78 : x
  2. Step 2: Convert to fraction form
    68,724.70/103,087.06 = 18,802.78/x
  3. Step 3: Cross multiply
    68,724.70x = 103,087.06 × 18,802.78
  4. Step 4: Simplify right side
    68,724.70x = 1,938,323,005.30
  5. Step 5: Solve for x
    x = 1,938,323,005.30/68,724.70
  6. Step 6: Final answer
    x = 28,204.17

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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.