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Finding the Fourth Proportional to 68,674.64, 102,881.22 and 39,112.88

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Solution

The fourth proportional to 68,674.64, 102,881.22 and 39,112.88 is: 58,594.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,674.64 : 102,881.22 = 39,112.88 : x
  2. Step 2: Convert to fraction form
    68,674.64/102,881.22 = 39,112.88/x
  3. Step 3: Cross multiply
    68,674.64x = 102,881.22 × 39,112.88
  4. Step 4: Simplify right side
    68,674.64x = 4,023,980,812.11
  5. Step 5: Solve for x
    x = 4,023,980,812.11/68,674.64
  6. Step 6: Final answer
    x = 58,594.86

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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.