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Finding the Fourth Proportional to 68,489.20, 102,906.60 and 43,541.20

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Solution

The fourth proportional to 68,489.20, 102,906.60 and 43,541.20 is: 65,421.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,489.20 : 102,906.60 = 43,541.20 : x
  2. Step 2: Convert to fraction form
    68,489.20/102,906.60 = 43,541.20/x
  3. Step 3: Cross multiply
    68,489.20x = 102,906.60 × 43,541.20
  4. Step 4: Simplify right side
    68,489.20x = 4,480,676,851.92
  5. Step 5: Solve for x
    x = 4,480,676,851.92/68,489.20
  6. Step 6: Final answer
    x = 65,421.66

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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.