Home / 149,399.51-206,171.32-81,416.46

Finding the Fourth Proportional to 149,399.51, 206,171.32 and 81,416.46

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Solution

The fourth proportional to 149,399.51, 206,171.32 and 81,416.46 is: 112,354.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,399.51 : 206,171.32 = 81,416.46 : x
  2. Step 2: Convert to fraction form
    149,399.51/206,171.32 = 81,416.46/x
  3. Step 3: Cross multiply
    149,399.51x = 206,171.32 × 81,416.46
  4. Step 4: Simplify right side
    149,399.51x = 16,785,739,027.93
  5. Step 5: Solve for x
    x = 16,785,739,027.93/149,399.51
  6. Step 6: Final answer
    x = 112,354.71

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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.