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Finding the Fourth Proportional to 66,390.96, 91,617.84 and 36,177.06

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Solution

The fourth proportional to 66,390.96, 91,617.84 and 36,177.06 is: 49,923.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,390.96 : 91,617.84 = 36,177.06 : x
  2. Step 2: Convert to fraction form
    66,390.96/91,617.84 = 36,177.06/x
  3. Step 3: Cross multiply
    66,390.96x = 91,617.84 × 36,177.06
  4. Step 4: Simplify right side
    66,390.96x = 3,314,464,094.75
  5. Step 5: Solve for x
    x = 3,314,464,094.75/66,390.96
  6. Step 6: Final answer
    x = 49,923.42

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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.