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Finding the Fourth Proportional to 66,661.36, 91,994.13 and 39,798.86

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Solution

The fourth proportional to 66,661.36, 91,994.13 and 39,798.86 is: 54,923.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661.36 : 91,994.13 = 39,798.86 : x
  2. Step 2: Convert to fraction form
    66,661.36/91,994.13 = 39,798.86/x
  3. Step 3: Cross multiply
    66,661.36x = 91,994.13 × 39,798.86
  4. Step 4: Simplify right side
    66,661.36x = 3,661,261,558.19
  5. Step 5: Solve for x
    x = 3,661,261,558.19/66,661.36
  6. Step 6: Final answer
    x = 54,923.29

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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.