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Finding the Fourth Proportional to 123,057.60, 184,586.40 and 121,891.20

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Solution

The fourth proportional to 123,057.60, 184,586.40 and 121,891.20 is: 182,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,057.60 : 184,586.40 = 121,891.20 : x
  2. Step 2: Convert to fraction form
    123,057.60/184,586.40 = 121,891.20/x
  3. Step 3: Cross multiply
    123,057.60x = 184,586.40 × 121,891.20
  4. Step 4: Simplify right side
    123,057.60x = 22,499,457,799.68
  5. Step 5: Solve for x
    x = 22,499,457,799.68/123,057.60
  6. Step 6: Final answer
    x = 182,836.80

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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.