Home / 77,815.20-116,722.80-68,629.80

Finding the Fourth Proportional to 77,815.20, 116,722.80 and 68,629.80

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Solution

The fourth proportional to 77,815.20, 116,722.80 and 68,629.80 is: 102,944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,815.20 : 116,722.80 = 68,629.80 : x
  2. Step 2: Convert to fraction form
    77,815.20/116,722.80 = 68,629.80/x
  3. Step 3: Cross multiply
    77,815.20x = 116,722.80 × 68,629.80
  4. Step 4: Simplify right side
    77,815.20x = 8,010,662,419.44
  5. Step 5: Solve for x
    x = 8,010,662,419.44/77,815.20
  6. Step 6: Final answer
    x = 102,944.70

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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.