Home / 138,828.96-208,105.20-55,781.28

Finding the Fourth Proportional to 138,828.96, 208,105.20 and 55,781.28

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Solution

The fourth proportional to 138,828.96, 208,105.20 and 55,781.28 is: 83,616.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,828.96 : 208,105.20 = 55,781.28 : x
  2. Step 2: Convert to fraction form
    138,828.96/208,105.20 = 55,781.28/x
  3. Step 3: Cross multiply
    138,828.96x = 208,105.20 × 55,781.28
  4. Step 4: Simplify right side
    138,828.96x = 11,608,374,430.66
  5. Step 5: Solve for x
    x = 11,608,374,430.66/138,828.96
  6. Step 6: Final answer
    x = 83,616.38

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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.