Home / 135,475.77-186,918.48-81,021.36

Finding the Fourth Proportional to 135,475.77, 186,918.48 and 81,021.36

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Solution

The fourth proportional to 135,475.77, 186,918.48 and 81,021.36 is: 111,786.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,475.77 : 186,918.48 = 81,021.36 : x
  2. Step 2: Convert to fraction form
    135,475.77/186,918.48 = 81,021.36/x
  3. Step 3: Cross multiply
    135,475.77x = 186,918.48 × 81,021.36
  4. Step 4: Simplify right side
    135,475.77x = 15,144,389,458.73
  5. Step 5: Solve for x
    x = 15,144,389,458.73/135,475.77
  6. Step 6: Final answer
    x = 111,786.70

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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.