Home / 81,789.36-112,869.80-45,979.06

Finding the Fourth Proportional to 81,789.36, 112,869.80 and 45,979.06

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Solution

The fourth proportional to 81,789.36, 112,869.80 and 45,979.06 is: 63,451.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.36 : 112,869.80 = 45,979.06 : x
  2. Step 2: Convert to fraction form
    81,789.36/112,869.80 = 45,979.06/x
  3. Step 3: Cross multiply
    81,789.36x = 112,869.80 × 45,979.06
  4. Step 4: Simplify right side
    81,789.36x = 5,189,647,306.39
  5. Step 5: Solve for x
    x = 5,189,647,306.39/81,789.36
  6. Step 6: Final answer
    x = 63,451.37

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1.5x scale

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.