Home / 81,812.20-122,718.30-72,626.80

Finding the Fourth Proportional to 81,812.20, 122,718.30 and 72,626.80

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Solution

The fourth proportional to 81,812.20, 122,718.30 and 72,626.80 is: 108,940.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,812.20 : 122,718.30 = 72,626.80 : x
  2. Step 2: Convert to fraction form
    81,812.20/122,718.30 = 72,626.80/x
  3. Step 3: Cross multiply
    81,812.20x = 122,718.30 × 72,626.80
  4. Step 4: Simplify right side
    81,812.20x = 8,912,637,430.44
  5. Step 5: Solve for x
    x = 8,912,637,430.44/81,812.20
  6. Step 6: Final answer
    x = 108,940.20

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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.