Home / 149,268.64-205,987.75-81,286.45

Finding the Fourth Proportional to 149,268.64, 205,987.75 and 81,286.45

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Solution

The fourth proportional to 149,268.64, 205,987.75 and 81,286.45 is: 112,173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,268.64 : 205,987.75 = 81,286.45 : x
  2. Step 2: Convert to fraction form
    149,268.64/205,987.75 = 81,286.45/x
  3. Step 3: Cross multiply
    149,268.64x = 205,987.75 × 81,286.45
  4. Step 4: Simplify right side
    149,268.64x = 16,744,012,940.99
  5. Step 5: Solve for x
    x = 16,744,012,940.99/149,268.64
  6. Step 6: Final answer
    x = 112,173.68

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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.