Home / 103,839.30-155,647.71-74,167.11

Finding the Fourth Proportional to 103,839.30, 155,647.71 and 74,167.11

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Solution

The fourth proportional to 103,839.30, 155,647.71 and 74,167.11 is: 111,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,839.30 : 155,647.71 = 74,167.11 : x
  2. Step 2: Convert to fraction form
    103,839.30/155,647.71 = 74,167.11/x
  3. Step 3: Cross multiply
    103,839.30x = 155,647.71 × 74,167.11
  4. Step 4: Simplify right side
    103,839.30x = 11,543,940,828.82
  5. Step 5: Solve for x
    x = 11,543,940,828.82/103,839.30
  6. Step 6: Final answer
    x = 111,171.21

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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.