Home / 78,546.38-117,817.81-19,382.56

Finding the Fourth Proportional to 78,546.38, 117,817.81 and 19,382.56

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Solution

The fourth proportional to 78,546.38, 117,817.81 and 19,382.56 is: 29,073.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,546.38 : 117,817.81 = 19,382.56 : x
  2. Step 2: Convert to fraction form
    78,546.38/117,817.81 = 19,382.56/x
  3. Step 3: Cross multiply
    78,546.38x = 117,817.81 × 19,382.56
  4. Step 4: Simplify right side
    78,546.38x = 2,283,610,428.39
  5. Step 5: Solve for x
    x = 2,283,610,428.39/78,546.38
  6. Step 6: Final answer
    x = 29,073.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.