Home / 100,081.14-138,095.73-55,360.50

Finding the Fourth Proportional to 100,081.14, 138,095.73 and 55,360.50

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Solution

The fourth proportional to 100,081.14, 138,095.73 and 55,360.50 is: 76,388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,081.14 : 138,095.73 = 55,360.50 : x
  2. Step 2: Convert to fraction form
    100,081.14/138,095.73 = 55,360.50/x
  3. Step 3: Cross multiply
    100,081.14x = 138,095.73 × 55,360.50
  4. Step 4: Simplify right side
    100,081.14x = 7,645,048,660.67
  5. Step 5: Solve for x
    x = 7,645,048,660.67/100,081.14
  6. Step 6: Final answer
    x = 76,388.50

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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.