Home / 138,579.03-191,238.27-78,150.20

Finding the Fourth Proportional to 138,579.03, 191,238.27 and 78,150.20

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Solution

The fourth proportional to 138,579.03, 191,238.27 and 78,150.20 is: 107,846.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,579.03 : 191,238.27 = 78,150.20 : x
  2. Step 2: Convert to fraction form
    138,579.03/191,238.27 = 78,150.20/x
  3. Step 3: Cross multiply
    138,579.03x = 191,238.27 × 78,150.20
  4. Step 4: Simplify right side
    138,579.03x = 14,945,308,091.96
  5. Step 5: Solve for x
    x = 14,945,308,091.96/138,579.03
  6. Step 6: Final answer
    x = 107,846.82

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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.