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Finding the Fourth Proportional to 66,205.60, 91,359.93 and 35,990.67

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Solution

The fourth proportional to 66,205.60, 91,359.93 and 35,990.67 is: 49,665.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,205.60 : 91,359.93 = 35,990.67 : x
  2. Step 2: Convert to fraction form
    66,205.60/91,359.93 = 35,990.67/x
  3. Step 3: Cross multiply
    66,205.60x = 91,359.93 × 35,990.67
  4. Step 4: Simplify right side
    66,205.60x = 3,288,105,299.49
  5. Step 5: Solve for x
    x = 3,288,105,299.49/66,205.60
  6. Step 6: Final answer
    x = 49,665.06

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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.