Home / 81,579.59-112,370.07-57,665.15

Finding the Fourth Proportional to 81,579.59, 112,370.07 and 57,665.15

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Solution

The fourth proportional to 81,579.59, 112,370.07 and 57,665.15 is: 79,429.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,579.59 : 112,370.07 = 57,665.15 : x
  2. Step 2: Convert to fraction form
    81,579.59/112,370.07 = 57,665.15/x
  3. Step 3: Cross multiply
    81,579.59x = 112,370.07 × 57,665.15
  4. Step 4: Simplify right side
    81,579.59x = 6,479,836,091.88
  5. Step 5: Solve for x
    x = 6,479,836,091.88/81,579.59
  6. Step 6: Final answer
    x = 79,429.63

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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.