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Finding the Fourth Proportional to 66,392.45, 91,620.40 and 36,178.03

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Solution

The fourth proportional to 66,392.45, 91,620.40 and 36,178.03 is: 49,925.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,392.45 : 91,620.40 = 36,178.03 : x
  2. Step 2: Convert to fraction form
    66,392.45/91,620.40 = 36,178.03/x
  3. Step 3: Cross multiply
    66,392.45x = 91,620.40 × 36,178.03
  4. Step 4: Simplify right side
    66,392.45x = 3,314,645,579.81
  5. Step 5: Solve for x
    x = 3,314,645,579.81/66,392.45
  6. Step 6: Final answer
    x = 49,925.04

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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.