Home / 81,983.40-122,970.24-28,671.66

Finding the Fourth Proportional to 81,983.40, 122,970.24 and 28,671.66

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Solution

The fourth proportional to 81,983.40, 122,970.24 and 28,671.66 is: 43,005.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,983.40 : 122,970.24 = 28,671.66 : x
  2. Step 2: Convert to fraction form
    81,983.40/122,970.24 = 28,671.66/x
  3. Step 3: Cross multiply
    81,983.40x = 122,970.24 × 28,671.66
  4. Step 4: Simplify right side
    81,983.40x = 3,525,760,911.40
  5. Step 5: Solve for x
    x = 3,525,760,911.40/81,983.40
  6. Step 6: Final answer
    x = 43,005.79

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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.