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Finding the Fourth Proportional to 68,420.44, 102,546.80 and 38,863.16

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Solution

The fourth proportional to 68,420.44, 102,546.80 and 38,863.16 is: 58,247.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,420.44 : 102,546.80 = 38,863.16 : x
  2. Step 2: Convert to fraction form
    68,420.44/102,546.80 = 38,863.16/x
  3. Step 3: Cross multiply
    68,420.44x = 102,546.80 × 38,863.16
  4. Step 4: Simplify right side
    68,420.44x = 3,985,292,695.89
  5. Step 5: Solve for x
    x = 3,985,292,695.89/68,420.44
  6. Step 6: Final answer
    x = 58,247.11

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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.