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Finding the Fourth Proportional to 66,714.44, 100,078.65 and 21,739.29

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Solution

The fourth proportional to 66,714.44, 100,078.65 and 21,739.29 is: 32,611.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,714.44 : 100,078.65 = 21,739.29 : x
  2. Step 2: Convert to fraction form
    66,714.44/100,078.65 = 21,739.29/x
  3. Step 3: Cross multiply
    66,714.44x = 100,078.65 × 21,739.29
  4. Step 4: Simplify right side
    66,714.44x = 2,175,638,795.16
  5. Step 5: Solve for x
    x = 2,175,638,795.16/66,714.44
  6. Step 6: Final answer
    x = 32,611.21

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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.