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Finding the Fourth Proportional to 66,782.09, 100,213.45 and 35,215.49

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Solution

The fourth proportional to 66,782.09, 100,213.45 and 35,215.49 is: 52,844.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,782.09 : 100,213.45 = 35,215.49 : x
  2. Step 2: Convert to fraction form
    66,782.09/100,213.45 = 35,215.49/x
  3. Step 3: Cross multiply
    66,782.09x = 100,213.45 × 35,215.49
  4. Step 4: Simplify right side
    66,782.09x = 3,529,065,908.84
  5. Step 5: Solve for x
    x = 3,529,065,908.84/66,782.09
  6. Step 6: Final answer
    x = 52,844.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.