Home / 138,011.68-190,456.91-77,581.79

Finding the Fourth Proportional to 138,011.68, 190,456.91 and 77,581.79

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Solution

The fourth proportional to 138,011.68, 190,456.91 and 77,581.79 is: 107,063.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,011.68 : 190,456.91 = 77,581.79 : x
  2. Step 2: Convert to fraction form
    138,011.68/190,456.91 = 77,581.79/x
  3. Step 3: Cross multiply
    138,011.68x = 190,456.91 × 77,581.79
  4. Step 4: Simplify right side
    138,011.68x = 14,775,987,660.62
  5. Step 5: Solve for x
    x = 14,775,987,660.62/138,011.68
  6. Step 6: Final answer
    x = 107,063.32

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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.