Home / 128,696.69-177,541.36-80,976.35

Finding the Fourth Proportional to 128,696.69, 177,541.36 and 80,976.35

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Solution

The fourth proportional to 128,696.69, 177,541.36 and 80,976.35 is: 111,709.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,696.69 : 177,541.36 = 80,976.35 : x
  2. Step 2: Convert to fraction form
    128,696.69/177,541.36 = 80,976.35/x
  3. Step 3: Cross multiply
    128,696.69x = 177,541.36 × 80,976.35
  4. Step 4: Simplify right side
    128,696.69x = 14,376,651,306.84
  5. Step 5: Solve for x
    x = 14,376,651,306.84/128,696.69
  6. Step 6: Final answer
    x = 111,709.57

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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.