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Finding the Fourth Proportional to 66,203.60, 91,361.04 and 35,989.28

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Solution

The fourth proportional to 66,203.60, 91,361.04 and 35,989.28 is: 49,665.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,203.60 : 91,361.04 = 35,989.28 : x
  2. Step 2: Convert to fraction form
    66,203.60/91,361.04 = 35,989.28/x
  3. Step 3: Cross multiply
    66,203.60x = 91,361.04 × 35,989.28
  4. Step 4: Simplify right side
    66,203.60x = 3,288,018,049.65
  5. Step 5: Solve for x
    x = 3,288,018,049.65/66,203.60
  6. Step 6: Final answer
    x = 49,665.25

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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.