Home / 138,749.36-208,039.74-54,408.46

Finding the Fourth Proportional to 138,749.36, 208,039.74 and 54,408.46

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Solution

The fourth proportional to 138,749.36, 208,039.74 and 54,408.46 is: 81,579.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,749.36 : 208,039.74 = 54,408.46 : x
  2. Step 2: Convert to fraction form
    138,749.36/208,039.74 = 54,408.46/x
  3. Step 3: Cross multiply
    138,749.36x = 208,039.74 × 54,408.46
  4. Step 4: Simplify right side
    138,749.36x = 11,319,121,872.20
  5. Step 5: Solve for x
    x = 11,319,121,872.20/138,749.36
  6. Step 6: Final answer
    x = 81,579.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.