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Finding the Fourth Proportional to 68,714.80, 103,072.20 and 57,041.20

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Solution

The fourth proportional to 68,714.80, 103,072.20 and 57,041.20 is: 85,561.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,714.80 : 103,072.20 = 57,041.20 : x
  2. Step 2: Convert to fraction form
    68,714.80/103,072.20 = 57,041.20/x
  3. Step 3: Cross multiply
    68,714.80x = 103,072.20 × 57,041.20
  4. Step 4: Simplify right side
    68,714.80x = 5,879,361,974.64
  5. Step 5: Solve for x
    x = 5,879,361,974.64/68,714.80
  6. Step 6: Final answer
    x = 85,561.80

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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.