Home / 78,474.20-117,711.30-68,632.70

Finding the Fourth Proportional to 78,474.20, 117,711.30 and 68,632.70

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Solution

The fourth proportional to 78,474.20, 117,711.30 and 68,632.70 is: 102,949.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,474.20 : 117,711.30 = 68,632.70 : x
  2. Step 2: Convert to fraction form
    78,474.20/117,711.30 = 68,632.70/x
  3. Step 3: Cross multiply
    78,474.20x = 117,711.30 × 68,632.70
  4. Step 4: Simplify right side
    78,474.20x = 8,078,844,339.51
  5. Step 5: Solve for x
    x = 8,078,844,339.51/78,474.20
  6. Step 6: Final answer
    x = 102,949.05

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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.