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Finding the Fourth Proportional to 68,637.12, 102,889.92 and 21,859.68

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Solution

The fourth proportional to 68,637.12, 102,889.92 and 21,859.68 is: 32,768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,637.12 : 102,889.92 = 21,859.68 : x
  2. Step 2: Convert to fraction form
    68,637.12/102,889.92 = 21,859.68/x
  3. Step 3: Cross multiply
    68,637.12x = 102,889.92 × 21,859.68
  4. Step 4: Simplify right side
    68,637.12x = 2,249,140,726.43
  5. Step 5: Solve for x
    x = 2,249,140,726.43/68,637.12
  6. Step 6: Final answer
    x = 32,768.58

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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.