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Finding the Fourth Proportional to 68,959.40, 103,632.86 and 40,883.44

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Solution

The fourth proportional to 68,959.40, 103,632.86 and 40,883.44 is: 61,440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,959.40 : 103,632.86 = 40,883.44 : x
  2. Step 2: Convert to fraction form
    68,959.40/103,632.86 = 40,883.44/x
  3. Step 3: Cross multiply
    68,959.40x = 103,632.86 × 40,883.44
  4. Step 4: Simplify right side
    68,959.40x = 4,236,867,813.84
  5. Step 5: Solve for x
    x = 4,236,867,813.84/68,959.40
  6. Step 6: Final answer
    x = 61,440.03

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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.