Home / 138,856.48-208,144.47-54,675.72

Finding the Fourth Proportional to 138,856.48, 208,144.47 and 54,675.72

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Solution

The fourth proportional to 138,856.48, 208,144.47 and 54,675.72 is: 81,958.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,856.48 : 208,144.47 = 54,675.72 : x
  2. Step 2: Convert to fraction form
    138,856.48/208,144.47 = 54,675.72/x
  3. Step 3: Cross multiply
    138,856.48x = 208,144.47 × 54,675.72
  4. Step 4: Simplify right side
    138,856.48x = 11,380,448,761.27
  5. Step 5: Solve for x
    x = 11,380,448,761.27/138,856.48
  6. Step 6: Final answer
    x = 81,958.36

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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.