Home / 138,713.58-191,363.99-81,323.87

Finding the Fourth Proportional to 138,713.58, 191,363.99 and 81,323.87

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Solution

The fourth proportional to 138,713.58, 191,363.99 and 81,323.87 is: 112,191.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,713.58 : 191,363.99 = 81,323.87 : x
  2. Step 2: Convert to fraction form
    138,713.58/191,363.99 = 81,323.87/x
  3. Step 3: Cross multiply
    138,713.58x = 191,363.99 × 81,323.87
  4. Step 4: Simplify right side
    138,713.58x = 15,562,458,882.00
  5. Step 5: Solve for x
    x = 15,562,458,882.00/138,713.58
  6. Step 6: Final answer
    x = 112,191.31

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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.