Home / 138,628.26-191,356.02-82,039.50

Finding the Fourth Proportional to 138,628.26, 191,356.02 and 82,039.50

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Solution

The fourth proportional to 138,628.26, 191,356.02 and 82,039.50 is: 113,243.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,628.26 : 191,356.02 = 82,039.50 : x
  2. Step 2: Convert to fraction form
    138,628.26/191,356.02 = 82,039.50/x
  3. Step 3: Cross multiply
    138,628.26x = 191,356.02 × 82,039.50
  4. Step 4: Simplify right side
    138,628.26x = 15,698,752,202.79
  5. Step 5: Solve for x
    x = 15,698,752,202.79/138,628.26
  6. Step 6: Final answer
    x = 113,243.52

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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.