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Finding the Fourth Proportional to 66,242.88, 91,415.84 and 36,028.90

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Solution

The fourth proportional to 66,242.88, 91,415.84 and 36,028.90 is: 49,720.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,242.88 : 91,415.84 = 36,028.90 : x
  2. Step 2: Convert to fraction form
    66,242.88/91,415.84 = 36,028.90/x
  3. Step 3: Cross multiply
    66,242.88x = 91,415.84 × 36,028.90
  4. Step 4: Simplify right side
    66,242.88x = 3,293,612,294.56
  5. Step 5: Solve for x
    x = 3,293,612,294.56/66,242.88
  6. Step 6: Final answer
    x = 49,720.25

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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.