Home / 100,180.92-138,248.37-57,159.29

Finding the Fourth Proportional to 100,180.92, 138,248.37 and 57,159.29

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Solution

The fourth proportional to 100,180.92, 138,248.37 and 57,159.29 is: 78,879.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,180.92 : 138,248.37 = 57,159.29 : x
  2. Step 2: Convert to fraction form
    100,180.92/138,248.37 = 57,159.29/x
  3. Step 3: Cross multiply
    100,180.92x = 138,248.37 × 57,159.29
  4. Step 4: Simplify right side
    100,180.92x = 7,902,177,981.62
  5. Step 5: Solve for x
    x = 7,902,177,981.62/100,180.92
  6. Step 6: Final answer
    x = 78,879.07

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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.