Home / 84,896.36-126,721.33-78,641

Finding the Fourth Proportional to 84,896.36, 126,721.33 and 78,641

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Solution

The fourth proportional to 84,896.36, 126,721.33 and 78,641 is: 117,384.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,896.36 : 126,721.33 = 78,641 : x
  2. Step 2: Convert to fraction form
    84,896.36/126,721.33 = 78,641/x
  3. Step 3: Cross multiply
    84,896.36x = 126,721.33 × 78,641
  4. Step 4: Simplify right side
    84,896.36x = 9,965,492,112.53
  5. Step 5: Solve for x
    x = 9,965,492,112.53/84,896.36
  6. Step 6: Final answer
    x = 117,384.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.