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Finding the Fourth Proportional to 77,825.70, 116,738.55 and 68,640.30

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Solution

The fourth proportional to 77,825.70, 116,738.55 and 68,640.30 is: 102,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,825.70 : 116,738.55 = 68,640.30 : x
  2. Step 2: Convert to fraction form
    77,825.70/116,738.55 = 68,640.30/x
  3. Step 3: Cross multiply
    77,825.70x = 116,738.55 × 68,640.30
  4. Step 4: Simplify right side
    77,825.70x = 8,012,969,093.57
  5. Step 5: Solve for x
    x = 8,012,969,093.57/77,825.70
  6. Step 6: Final answer
    x = 102,960.45

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1.5x scale

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.