Home / 305,971.30-458,977.20-81,328.60

Finding the Fourth Proportional to 305,971.30, 458,977.20 and 81,328.60

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Solution

The fourth proportional to 305,971.30, 458,977.20 and 81,328.60 is: 121,998.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,971.30 : 458,977.20 = 81,328.60 : x
  2. Step 2: Convert to fraction form
    305,971.30/458,977.20 = 81,328.60/x
  3. Step 3: Cross multiply
    305,971.30x = 458,977.20 × 81,328.60
  4. Step 4: Simplify right side
    305,971.30x = 37,327,973,107.92
  5. Step 5: Solve for x
    x = 37,327,973,107.92/305,971.30
  6. Step 6: Final answer
    x = 121,998.28

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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.