Home / 128,789.18-177,712.14-71,427.82

Finding the Fourth Proportional to 128,789.18, 177,712.14 and 71,427.82

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Solution

The fourth proportional to 128,789.18, 177,712.14 and 71,427.82 is: 98,561.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,789.18 : 177,712.14 = 71,427.82 : x
  2. Step 2: Convert to fraction form
    128,789.18/177,712.14 = 71,427.82/x
  3. Step 3: Cross multiply
    128,789.18x = 177,712.14 × 71,427.82
  4. Step 4: Simplify right side
    128,789.18x = 12,693,590,747.73
  5. Step 5: Solve for x
    x = 12,693,590,747.73/128,789.18
  6. Step 6: Final answer
    x = 98,561.00

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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.