Home / 66,516.24-91,804.12-39,660.40

Finding the Fourth Proportional to 66,516.24, 91,804.12 and 39,660.40

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Solution

The fourth proportional to 66,516.24, 91,804.12 and 39,660.40 is: 54,738.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,516.24 : 91,804.12 = 39,660.40 : x
  2. Step 2: Convert to fraction form
    66,516.24/91,804.12 = 39,660.40/x
  3. Step 3: Cross multiply
    66,516.24x = 91,804.12 × 39,660.40
  4. Step 4: Simplify right side
    66,516.24x = 3,640,988,120.85
  5. Step 5: Solve for x
    x = 3,640,988,120.85/66,516.24
  6. Step 6: Final answer
    x = 54,738.33

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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.