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Finding the Fourth Proportional to 68,579.94, 102,785.10 and 40,471.50

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Solution

The fourth proportional to 68,579.94, 102,785.10 and 40,471.50 is: 60,657.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,579.94 : 102,785.10 = 40,471.50 : x
  2. Step 2: Convert to fraction form
    68,579.94/102,785.10 = 40,471.50/x
  3. Step 3: Cross multiply
    68,579.94x = 102,785.10 × 40,471.50
  4. Step 4: Simplify right side
    68,579.94x = 4,159,867,174.65
  5. Step 5: Solve for x
    x = 4,159,867,174.65/68,579.94
  6. Step 6: Final answer
    x = 60,657.20

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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.