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Finding the Fourth Proportional to 68,680.20, 102,890.70 and 64,014.60

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Solution

The fourth proportional to 68,680.20, 102,890.70 and 64,014.60 is: 95,901.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,680.20 : 102,890.70 = 64,014.60 : x
  2. Step 2: Convert to fraction form
    68,680.20/102,890.70 = 64,014.60/x
  3. Step 3: Cross multiply
    68,680.20x = 102,890.70 × 64,014.60
  4. Step 4: Simplify right side
    68,680.20x = 6,586,507,004.22
  5. Step 5: Solve for x
    x = 6,586,507,004.22/68,680.20
  6. Step 6: Final answer
    x = 95,901.10

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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.