Home / 138,979.81-191,812.70-87,997.27

Finding the Fourth Proportional to 138,979.81, 191,812.70 and 87,997.27

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Solution

The fourth proportional to 138,979.81, 191,812.70 and 87,997.27 is: 121,449.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,979.81 : 191,812.70 = 87,997.27 : x
  2. Step 2: Convert to fraction form
    138,979.81/191,812.70 = 87,997.27/x
  3. Step 3: Cross multiply
    138,979.81x = 191,812.70 × 87,997.27
  4. Step 4: Simplify right side
    138,979.81x = 16,878,993,951.33
  5. Step 5: Solve for x
    x = 16,878,993,951.33/138,979.81
  6. Step 6: Final answer
    x = 121,449.25

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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.