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Finding the Fourth Proportional to 66,078.64, 91,188.61 and 35,863.96

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Solution

The fourth proportional to 66,078.64, 91,188.61 and 35,863.96 is: 49,492.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,078.64 : 91,188.61 = 35,863.96 : x
  2. Step 2: Convert to fraction form
    66,078.64/91,188.61 = 35,863.96/x
  3. Step 3: Cross multiply
    66,078.64x = 91,188.61 × 35,863.96
  4. Step 4: Simplify right side
    66,078.64x = 3,270,384,661.50
  5. Step 5: Solve for x
    x = 3,270,384,661.50/66,078.64
  6. Step 6: Final answer
    x = 49,492.31

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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.