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Finding the Fourth Proportional to 116,729.53, 161,087.42 and 66,428.53

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Solution

The fourth proportional to 116,729.53, 161,087.42 and 66,428.53 is: 91,671.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,729.53 : 161,087.42 = 66,428.53 : x
  2. Step 2: Convert to fraction form
    116,729.53/161,087.42 = 66,428.53/x
  3. Step 3: Cross multiply
    116,729.53x = 161,087.42 × 66,428.53
  4. Step 4: Simplify right side
    116,729.53x = 10,700,800,512.09
  5. Step 5: Solve for x
    x = 10,700,800,512.09/116,729.53
  6. Step 6: Final answer
    x = 91,671.75

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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.