Home / 66,147.06-91,280.30-39,288.84

Finding the Fourth Proportional to 66,147.06, 91,280.30 and 39,288.84

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Solution

The fourth proportional to 66,147.06, 91,280.30 and 39,288.84 is: 54,217.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,147.06 : 91,280.30 = 39,288.84 : x
  2. Step 2: Convert to fraction form
    66,147.06/91,280.30 = 39,288.84/x
  3. Step 3: Cross multiply
    66,147.06x = 91,280.30 × 39,288.84
  4. Step 4: Simplify right side
    66,147.06x = 3,586,297,101.85
  5. Step 5: Solve for x
    x = 3,586,297,101.85/66,147.06
  6. Step 6: Final answer
    x = 54,217.03

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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.