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Finding the Fourth Proportional to 68,718.87, 102,903.30 and 45,274.23

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Solution

The fourth proportional to 68,718.87, 102,903.30 and 45,274.23 is: 67,796.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,718.87 : 102,903.30 = 45,274.23 : x
  2. Step 2: Convert to fraction form
    68,718.87/102,903.30 = 45,274.23/x
  3. Step 3: Cross multiply
    68,718.87x = 102,903.30 × 45,274.23
  4. Step 4: Simplify right side
    68,718.87x = 4,658,867,671.96
  5. Step 5: Solve for x
    x = 4,658,867,671.96/68,718.87
  6. Step 6: Final answer
    x = 67,796.05

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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.