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Finding the Fourth Proportional to 66,415.95, 91,651.35 and 36,200.64

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Solution

The fourth proportional to 66,415.95, 91,651.35 and 36,200.64 is: 49,955.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,415.95 : 91,651.35 = 36,200.64 : x
  2. Step 2: Convert to fraction form
    66,415.95/91,651.35 = 36,200.64/x
  3. Step 3: Cross multiply
    66,415.95x = 91,651.35 × 36,200.64
  4. Step 4: Simplify right side
    66,415.95x = 3,317,837,526.86
  5. Step 5: Solve for x
    x = 3,317,837,526.86/66,415.95
  6. Step 6: Final answer
    x = 49,955.43

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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.