Home / 135,288.09-202,460.55-81,949.89

Finding the Fourth Proportional to 135,288.09, 202,460.55 and 81,949.89

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Solution

The fourth proportional to 135,288.09, 202,460.55 and 81,949.89 is: 122,639.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,288.09 : 202,460.55 = 81,949.89 : x
  2. Step 2: Convert to fraction form
    135,288.09/202,460.55 = 81,949.89/x
  3. Step 3: Cross multiply
    135,288.09x = 202,460.55 × 81,949.89
  4. Step 4: Simplify right side
    135,288.09x = 16,591,619,801.84
  5. Step 5: Solve for x
    x = 16,591,619,801.84/135,288.09
  6. Step 6: Final answer
    x = 122,639.18

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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.