Home / 120,078.43-165,693.87-66,356.15

Finding the Fourth Proportional to 120,078.43, 165,693.87 and 66,356.15

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Solution

The fourth proportional to 120,078.43, 165,693.87 and 66,356.15 is: 91,563.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,078.43 : 165,693.87 = 66,356.15 : x
  2. Step 2: Convert to fraction form
    120,078.43/165,693.87 = 66,356.15/x
  3. Step 3: Cross multiply
    120,078.43x = 165,693.87 × 66,356.15
  4. Step 4: Simplify right side
    120,078.43x = 10,994,806,463.33
  5. Step 5: Solve for x
    x = 10,994,806,463.33/120,078.43
  6. Step 6: Final answer
    x = 91,563.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.