Home / 128,865.63-177,912.33-84,231.39

Finding the Fourth Proportional to 128,865.63, 177,912.33 and 84,231.39

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Solution

The fourth proportional to 128,865.63, 177,912.33 and 84,231.39 is: 116,290.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.63 : 177,912.33 = 84,231.39 : x
  2. Step 2: Convert to fraction form
    128,865.63/177,912.33 = 84,231.39/x
  3. Step 3: Cross multiply
    128,865.63x = 177,912.33 × 84,231.39
  4. Step 4: Simplify right side
    128,865.63x = 14,985,802,854.04
  5. Step 5: Solve for x
    x = 14,985,802,854.04/128,865.63
  6. Step 6: Final answer
    x = 116,290.15

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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.