Home / 80,905.92-111,396.09-68,782.55

Finding the Fourth Proportional to 80,905.92, 111,396.09 and 68,782.55

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Solution

The fourth proportional to 80,905.92, 111,396.09 and 68,782.55 is: 94,703.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.92 : 111,396.09 = 68,782.55 : x
  2. Step 2: Convert to fraction form
    80,905.92/111,396.09 = 68,782.55/x
  3. Step 3: Cross multiply
    80,905.92x = 111,396.09 × 68,782.55
  4. Step 4: Simplify right side
    80,905.92x = 7,662,106,573.25
  5. Step 5: Solve for x
    x = 7,662,106,573.25/80,905.92
  6. Step 6: Final answer
    x = 94,703.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.