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Finding the Fourth Proportional to 66,657.87, 91,990.11 and 36,442.61

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Solution

The fourth proportional to 66,657.87, 91,990.11 and 36,442.61 is: 50,292.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,657.87 : 91,990.11 = 36,442.61 : x
  2. Step 2: Convert to fraction form
    66,657.87/91,990.11 = 36,442.61/x
  3. Step 3: Cross multiply
    66,657.87x = 91,990.11 × 36,442.61
  4. Step 4: Simplify right side
    66,657.87x = 3,352,359,242.64
  5. Step 5: Solve for x
    x = 3,352,359,242.64/66,657.87
  6. Step 6: Final answer
    x = 50,292.02

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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.