Home / 116,729.78-161,087.76-66,428.78

Finding the Fourth Proportional to 116,729.78, 161,087.76 and 66,428.78

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Solution

The fourth proportional to 116,729.78, 161,087.76 and 66,428.78 is: 91,672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,729.78 : 161,087.76 = 66,428.78 : x
  2. Step 2: Convert to fraction form
    116,729.78/161,087.76 = 66,428.78/x
  3. Step 3: Cross multiply
    116,729.78x = 161,087.76 × 66,428.78
  4. Step 4: Simplify right side
    116,729.78x = 10,700,863,369.73
  5. Step 5: Solve for x
    x = 10,700,863,369.73/116,729.78
  6. Step 6: Final answer
    x = 91,672.09

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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.