Home / 68,705.24-103,072.57-21,319.30

Finding the Fourth Proportional to 68,705.24, 103,072.57 and 21,319.30

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Solution

The fourth proportional to 68,705.24, 103,072.57 and 21,319.30 is: 31,983.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,705.24 : 103,072.57 = 21,319.30 : x
  2. Step 2: Convert to fraction form
    68,705.24/103,072.57 = 21,319.30/x
  3. Step 3: Cross multiply
    68,705.24x = 103,072.57 × 21,319.30
  4. Step 4: Simplify right side
    68,705.24x = 2,197,435,041.60
  5. Step 5: Solve for x
    x = 2,197,435,041.60/68,705.24
  6. Step 6: Final answer
    x = 31,983.51

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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.