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Finding the Fourth Proportional to 66,018.66, 91,105.80 and 35,803.97

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Solution

The fourth proportional to 66,018.66, 91,105.80 and 35,803.97 is: 49,409.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,018.66 : 91,105.80 = 35,803.97 : x
  2. Step 2: Convert to fraction form
    66,018.66/91,105.80 = 35,803.97/x
  3. Step 3: Cross multiply
    66,018.66x = 91,105.80 × 35,803.97
  4. Step 4: Simplify right side
    66,018.66x = 3,261,949,594.35
  5. Step 5: Solve for x
    x = 3,261,949,594.35/66,018.66
  6. Step 6: Final answer
    x = 49,409.51

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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.