Home / 149,140.52-205,809.78-81,155.92

Finding the Fourth Proportional to 149,140.52, 205,809.78 and 81,155.92

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Solution

The fourth proportional to 149,140.52, 205,809.78 and 81,155.92 is: 111,992.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,140.52 : 205,809.78 = 81,155.92 : x
  2. Step 2: Convert to fraction form
    149,140.52/205,809.78 = 81,155.92/x
  3. Step 3: Cross multiply
    149,140.52x = 205,809.78 × 81,155.92
  4. Step 4: Simplify right side
    149,140.52x = 16,702,682,040.90
  5. Step 5: Solve for x
    x = 16,702,682,040.90/149,140.52
  6. Step 6: Final answer
    x = 111,992.92

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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.