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Finding the Fourth Proportional to 123,090.60, 184,635.90 and 115,314.60

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Solution

The fourth proportional to 123,090.60, 184,635.90 and 115,314.60 is: 172,971.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,090.60 : 184,635.90 = 115,314.60 : x
  2. Step 2: Convert to fraction form
    123,090.60/184,635.90 = 115,314.60/x
  3. Step 3: Cross multiply
    123,090.60x = 184,635.90 × 115,314.60
  4. Step 4: Simplify right side
    123,090.60x = 21,291,214,954.14
  5. Step 5: Solve for x
    x = 21,291,214,954.14/123,090.60
  6. Step 6: Final answer
    x = 172,971.90

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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.