Home / 128,949.87-177,942.62-71,590.33

Finding the Fourth Proportional to 128,949.87, 177,942.62 and 71,590.33

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Solution

The fourth proportional to 128,949.87, 177,942.62 and 71,590.33 is: 98,790.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,949.87 : 177,942.62 = 71,590.33 : x
  2. Step 2: Convert to fraction form
    128,949.87/177,942.62 = 71,590.33/x
  3. Step 3: Cross multiply
    128,949.87x = 177,942.62 × 71,590.33
  4. Step 4: Simplify right side
    128,949.87x = 12,738,970,084.06
  5. Step 5: Solve for x
    x = 12,738,970,084.06/128,949.87
  6. Step 6: Final answer
    x = 98,790.10

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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.