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Finding the Fourth Proportional to 68,346.60, 102,534.72 and 20,961.84

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Solution

The fourth proportional to 68,346.60, 102,534.72 and 20,961.84 is: 31,447.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,346.60 : 102,534.72 = 20,961.84 : x
  2. Step 2: Convert to fraction form
    68,346.60/102,534.72 = 20,961.84/x
  3. Step 3: Cross multiply
    68,346.60x = 102,534.72 × 20,961.84
  4. Step 4: Simplify right side
    68,346.60x = 2,149,316,395.08
  5. Step 5: Solve for x
    x = 2,149,316,395.08/68,346.60
  6. Step 6: Final answer
    x = 31,447.31

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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.