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Finding the Fourth Proportional to 66,135, 91,263.68 and 35,919.64

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Solution

The fourth proportional to 66,135, 91,263.68 and 35,919.64 is: 49,567.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,135 : 91,263.68 = 35,919.64 : x
  2. Step 2: Convert to fraction form
    66,135/91,263.68 = 35,919.64/x
  3. Step 3: Cross multiply
    66,135x = 91,263.68 × 35,919.64
  4. Step 4: Simplify right side
    66,135x = 3,278,158,530.68
  5. Step 5: Solve for x
    x = 3,278,158,530.68/66,135
  6. Step 6: Final answer
    x = 49,567.68

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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.