Home / 128,789.82-177,575.50-83,451.26

Finding the Fourth Proportional to 128,789.82, 177,575.50 and 83,451.26

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Solution

The fourth proportional to 128,789.82, 177,575.50 and 83,451.26 is: 115,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,789.82 : 177,575.50 = 83,451.26 : x
  2. Step 2: Convert to fraction form
    128,789.82/177,575.50 = 83,451.26/x
  3. Step 3: Cross multiply
    128,789.82x = 177,575.50 × 83,451.26
  4. Step 4: Simplify right side
    128,789.82x = 14,818,898,123.62
  5. Step 5: Solve for x
    x = 14,818,898,123.62/128,789.82
  6. Step 6: Final answer
    x = 115,062.65

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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.