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Finding the Fourth Proportional to 80,796.91, 111,395.51 and 66,206.84

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Solution

The fourth proportional to 80,796.91, 111,395.51 and 66,206.84 is: 91,280.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,796.91 : 111,395.51 = 66,206.84 : x
  2. Step 2: Convert to fraction form
    80,796.91/111,395.51 = 66,206.84/x
  3. Step 3: Cross multiply
    80,796.91x = 111,395.51 × 66,206.84
  4. Step 4: Simplify right side
    80,796.91x = 7,375,144,376.25
  5. Step 5: Solve for x
    x = 7,375,144,376.25/80,796.91
  6. Step 6: Final answer
    x = 91,280.04

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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.