Home / 81,087.52-121,666.32-43,603.78

Finding the Fourth Proportional to 81,087.52, 121,666.32 and 43,603.78

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Solution

The fourth proportional to 81,087.52, 121,666.32 and 43,603.78 is: 65,424.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,087.52 : 121,666.32 = 43,603.78 : x
  2. Step 2: Convert to fraction form
    81,087.52/121,666.32 = 43,603.78/x
  3. Step 3: Cross multiply
    81,087.52x = 121,666.32 × 43,603.78
  4. Step 4: Simplify right side
    81,087.52x = 5,305,111,450.69
  5. Step 5: Solve for x
    x = 5,305,111,450.69/81,087.52
  6. Step 6: Final answer
    x = 65,424.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.