Home / 149,111.52-205,776.36-81,129.84

Finding the Fourth Proportional to 149,111.52, 205,776.36 and 81,129.84

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Solution

The fourth proportional to 149,111.52, 205,776.36 and 81,129.84 is: 111,960.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,111.52 : 205,776.36 = 81,129.84 : x
  2. Step 2: Convert to fraction form
    149,111.52/205,776.36 = 81,129.84/x
  3. Step 3: Cross multiply
    149,111.52x = 205,776.36 × 81,129.84
  4. Step 4: Simplify right side
    149,111.52x = 16,694,603,162.58
  5. Step 5: Solve for x
    x = 16,694,603,162.58/149,111.52
  6. Step 6: Final answer
    x = 111,960.52

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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.