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Finding the Fourth Proportional to 68,503.76, 102,758.52 and 21,763.28

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Solution

The fourth proportional to 68,503.76, 102,758.52 and 21,763.28 is: 32,645.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,503.76 : 102,758.52 = 21,763.28 : x
  2. Step 2: Convert to fraction form
    68,503.76/102,758.52 = 21,763.28/x
  3. Step 3: Cross multiply
    68,503.76x = 102,758.52 × 21,763.28
  4. Step 4: Simplify right side
    68,503.76x = 2,236,362,443.15
  5. Step 5: Solve for x
    x = 2,236,362,443.15/68,503.76
  6. Step 6: Final answer
    x = 32,645.83

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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.