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Finding the Fourth Proportional to 107,830.60, 161,745.90 and 82,918.60

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Solution

The fourth proportional to 107,830.60, 161,745.90 and 82,918.60 is: 124,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,830.60 : 161,745.90 = 82,918.60 : x
  2. Step 2: Convert to fraction form
    107,830.60/161,745.90 = 82,918.60/x
  3. Step 3: Cross multiply
    107,830.60x = 161,745.90 × 82,918.60
  4. Step 4: Simplify right side
    107,830.60x = 13,411,743,583.74
  5. Step 5: Solve for x
    x = 13,411,743,583.74/107,830.60
  6. Step 6: Final answer
    x = 124,377.90

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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.