Home / 136,342.81-188,160.83-81,911.63

Finding the Fourth Proportional to 136,342.81, 188,160.83 and 81,911.63

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Solution

The fourth proportional to 136,342.81, 188,160.83 and 81,911.63 is: 113,042.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,342.81 : 188,160.83 = 81,911.63 : x
  2. Step 2: Convert to fraction form
    136,342.81/188,160.83 = 81,911.63/x
  3. Step 3: Cross multiply
    136,342.81x = 188,160.83 × 81,911.63
  4. Step 4: Simplify right side
    136,342.81x = 15,412,560,287.45
  5. Step 5: Solve for x
    x = 15,412,560,287.45/136,342.81
  6. Step 6: Final answer
    x = 113,042.71

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1.5x scale

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.