Home / 138,620.52-191,296.44-81,248.40

Finding the Fourth Proportional to 138,620.52, 191,296.44 and 81,248.40

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Solution

The fourth proportional to 138,620.52, 191,296.44 and 81,248.40 is: 112,122.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.52 : 191,296.44 = 81,248.40 : x
  2. Step 2: Convert to fraction form
    138,620.52/191,296.44 = 81,248.40/x
  3. Step 3: Cross multiply
    138,620.52x = 191,296.44 × 81,248.40
  4. Step 4: Simplify right side
    138,620.52x = 15,542,529,675.70
  5. Step 5: Solve for x
    x = 15,542,529,675.70/138,620.52
  6. Step 6: Final answer
    x = 112,122.86

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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.