Home / 66,027.28-91,088.16-39,170.92

Finding the Fourth Proportional to 66,027.28, 91,088.16 and 39,170.92

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Solution

The fourth proportional to 66,027.28, 91,088.16 and 39,170.92 is: 54,038.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,027.28 : 91,088.16 = 39,170.92 : x
  2. Step 2: Convert to fraction form
    66,027.28/91,088.16 = 39,170.92/x
  3. Step 3: Cross multiply
    66,027.28x = 91,088.16 × 39,170.92
  4. Step 4: Simplify right side
    66,027.28x = 3,568,007,028.31
  5. Step 5: Solve for x
    x = 3,568,007,028.31/66,027.28
  6. Step 6: Final answer
    x = 54,038.38

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Double scale
Find fourth proportional to 66,028.28, 91,089.54 and 39,171.92
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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.