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Finding the Fourth Proportional to 68,025.72, 102,055.90 and 39,969.48

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Solution

The fourth proportional to 68,025.72, 102,055.90 and 39,969.48 is: 59,964.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,025.72 : 102,055.90 = 39,969.48 : x
  2. Step 2: Convert to fraction form
    68,025.72/102,055.90 = 39,969.48/x
  3. Step 3: Cross multiply
    68,025.72x = 102,055.90 × 39,969.48
  4. Step 4: Simplify right side
    68,025.72x = 4,079,121,253.93
  5. Step 5: Solve for x
    x = 4,079,121,253.93/68,025.72
  6. Step 6: Final answer
    x = 59,964.40

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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.