Home / 138,619.92-191,259.25-81,228.49

Finding the Fourth Proportional to 138,619.92, 191,259.25 and 81,228.49

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Solution

The fourth proportional to 138,619.92, 191,259.25 and 81,228.49 is: 112,074.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,619.92 : 191,259.25 = 81,228.49 : x
  2. Step 2: Convert to fraction form
    138,619.92/191,259.25 = 81,228.49/x
  3. Step 3: Cross multiply
    138,619.92x = 191,259.25 × 81,228.49
  4. Step 4: Simplify right side
    138,619.92x = 15,535,700,076.03
  5. Step 5: Solve for x
    x = 15,535,700,076.03/138,619.92
  6. Step 6: Final answer
    x = 112,074.08

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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.