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Finding the Fourth Proportional to 68,355.60, 102,548.22 and 20,970.84

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Solution

The fourth proportional to 68,355.60, 102,548.22 and 20,970.84 is: 31,460.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,355.60 : 102,548.22 = 20,970.84 : x
  2. Step 2: Convert to fraction form
    68,355.60/102,548.22 = 20,970.84/x
  3. Step 3: Cross multiply
    68,355.60x = 102,548.22 × 20,970.84
  4. Step 4: Simplify right side
    68,355.60x = 2,150,522,313.90
  5. Step 5: Solve for x
    x = 2,150,522,313.90/68,355.60
  6. Step 6: Final answer
    x = 31,460.81

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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.