Home / 81,789.13-112,866-45,982.45

Finding the Fourth Proportional to 81,789.13, 112,866 and 45,982.45

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Solution

The fourth proportional to 81,789.13, 112,866 and 45,982.45 is: 63,454.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,789.13 : 112,866 = 45,982.45 : x
  2. Step 2: Convert to fraction form
    81,789.13/112,866 = 45,982.45/x
  3. Step 3: Cross multiply
    81,789.13x = 112,866 × 45,982.45
  4. Step 4: Simplify right side
    81,789.13x = 5,189,855,201.70
  5. Step 5: Solve for x
    x = 5,189,855,201.70/81,789.13
  6. Step 6: Final answer
    x = 63,454.09

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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.