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Finding the Fourth Proportional to 66,628.84, 91,949.70 and 36,415.84

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Solution

The fourth proportional to 66,628.84, 91,949.70 and 36,415.84 is: 50,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,628.84 : 91,949.70 = 36,415.84 : x
  2. Step 2: Convert to fraction form
    66,628.84/91,949.70 = 36,415.84/x
  3. Step 3: Cross multiply
    66,628.84x = 91,949.70 × 36,415.84
  4. Step 4: Simplify right side
    66,628.84x = 3,348,425,563.25
  5. Step 5: Solve for x
    x = 3,348,425,563.25/66,628.84
  6. Step 6: Final answer
    x = 50,254.90

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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.