Home / 68,453.77-102,690.38-21,072.81

Finding the Fourth Proportional to 68,453.77, 102,690.38 and 21,072.81

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Solution

The fourth proportional to 68,453.77, 102,690.38 and 21,072.81 is: 31,612.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,453.77 : 102,690.38 = 21,072.81 : x
  2. Step 2: Convert to fraction form
    68,453.77/102,690.38 = 21,072.81/x
  3. Step 3: Cross multiply
    68,453.77x = 102,690.38 × 21,072.81
  4. Step 4: Simplify right side
    68,453.77x = 2,163,974,919.25
  5. Step 5: Solve for x
    x = 2,163,974,919.25/68,453.77
  6. Step 6: Final answer
    x = 31,612.21

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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.