Home / 100,986.14-139,338.42-57,963

Finding the Fourth Proportional to 100,986.14, 139,338.42 and 57,963

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Solution

The fourth proportional to 100,986.14, 139,338.42 and 57,963 is: 79,976.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,986.14 : 139,338.42 = 57,963 : x
  2. Step 2: Convert to fraction form
    100,986.14/139,338.42 = 57,963/x
  3. Step 3: Cross multiply
    100,986.14x = 139,338.42 × 57,963
  4. Step 4: Simplify right side
    100,986.14x = 8,076,472,838.46
  5. Step 5: Solve for x
    x = 8,076,472,838.46/100,986.14
  6. Step 6: Final answer
    x = 79,976.05

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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.