Home / 81,949.60-122,794.80-68,730.40

Finding the Fourth Proportional to 81,949.60, 122,794.80 and 68,730.40

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Solution

The fourth proportional to 81,949.60, 122,794.80 and 68,730.40 is: 102,986.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,949.60 : 122,794.80 = 68,730.40 : x
  2. Step 2: Convert to fraction form
    81,949.60/122,794.80 = 68,730.40/x
  3. Step 3: Cross multiply
    81,949.60x = 122,794.80 × 68,730.40
  4. Step 4: Simplify right side
    81,949.60x = 8,439,735,721.92
  5. Step 5: Solve for x
    x = 8,439,735,721.92/81,949.60
  6. Step 6: Final answer
    x = 102,986.91

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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.