Home / 101,022.78-139,427.55-77,104.02

Finding the Fourth Proportional to 101,022.78, 139,427.55 and 77,104.02

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Solution

The fourth proportional to 101,022.78, 139,427.55 and 77,104.02 is: 106,415.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,022.78 : 139,427.55 = 77,104.02 : x
  2. Step 2: Convert to fraction form
    101,022.78/139,427.55 = 77,104.02/x
  3. Step 3: Cross multiply
    101,022.78x = 139,427.55 × 77,104.02
  4. Step 4: Simplify right side
    101,022.78x = 10,750,424,603.75
  5. Step 5: Solve for x
    x = 10,750,424,603.75/101,022.78
  6. Step 6: Final answer
    x = 106,415.85

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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.