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Finding the Fourth Proportional to 66,135.60, 91,267.79 and 35,921.21

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Solution

The fourth proportional to 66,135.60, 91,267.79 and 35,921.21 is: 49,571.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,135.60 : 91,267.79 = 35,921.21 : x
  2. Step 2: Convert to fraction form
    66,135.60/91,267.79 = 35,921.21/x
  3. Step 3: Cross multiply
    66,135.60x = 91,267.79 × 35,921.21
  4. Step 4: Simplify right side
    66,135.60x = 3,278,448,814.88
  5. Step 5: Solve for x
    x = 3,278,448,814.88/66,135.60
  6. Step 6: Final answer
    x = 49,571.62

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1.5x scale

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.