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Finding the Fourth Proportional to 117,310.84, 161,850.90 and 66,318.64

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Solution

The fourth proportional to 117,310.84, 161,850.90 and 66,318.64 is: 91,498.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,310.84 : 161,850.90 = 66,318.64 : x
  2. Step 2: Convert to fraction form
    117,310.84/161,850.90 = 66,318.64/x
  3. Step 3: Cross multiply
    117,310.84x = 161,850.90 × 66,318.64
  4. Step 4: Simplify right side
    117,310.84x = 10,733,731,570.78
  5. Step 5: Solve for x
    x = 10,733,731,570.78/117,310.84
  6. Step 6: Final answer
    x = 91,498.21

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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.