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Finding the Fourth Proportional to 68,525.21, 102,797.48 and 21,144.16

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Solution

The fourth proportional to 68,525.21, 102,797.48 and 21,144.16 is: 31,719.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,525.21 : 102,797.48 = 21,144.16 : x
  2. Step 2: Convert to fraction form
    68,525.21/102,797.48 = 21,144.16/x
  3. Step 3: Cross multiply
    68,525.21x = 102,797.48 × 21,144.16
  4. Step 4: Simplify right side
    68,525.21x = 2,173,565,848.90
  5. Step 5: Solve for x
    x = 2,173,565,848.90/68,525.21
  6. Step 6: Final answer
    x = 31,719.22

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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.