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Finding the Fourth Proportional to 68,705.70, 103,058.55 and 66,081.30

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Solution

The fourth proportional to 68,705.70, 103,058.55 and 66,081.30 is: 99,121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,705.70 : 103,058.55 = 66,081.30 : x
  2. Step 2: Convert to fraction form
    68,705.70/103,058.55 = 66,081.30/x
  3. Step 3: Cross multiply
    68,705.70x = 103,058.55 × 66,081.30
  4. Step 4: Simplify right side
    68,705.70x = 6,810,242,960.12
  5. Step 5: Solve for x
    x = 6,810,242,960.12/68,705.70
  6. Step 6: Final answer
    x = 99,121.95

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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.