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Finding the Fourth Proportional to 66,287.38, 91,441.74 and 39,410.77

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Solution

The fourth proportional to 66,287.38, 91,441.74 and 39,410.77 is: 54,366.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,287.38 : 91,441.74 = 39,410.77 : x
  2. Step 2: Convert to fraction form
    66,287.38/91,441.74 = 39,410.77/x
  3. Step 3: Cross multiply
    66,287.38x = 91,441.74 × 39,410.77
  4. Step 4: Simplify right side
    66,287.38x = 3,603,789,383.54
  5. Step 5: Solve for x
    x = 3,603,789,383.54/66,287.38
  6. Step 6: Final answer
    x = 54,366.15

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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.