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Finding the Fourth Proportional to 149,668.69, 206,578.20 and 86,043.46

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Solution

The fourth proportional to 149,668.69, 206,578.20 and 86,043.46 is: 118,760.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,668.69 : 206,578.20 = 86,043.46 : x
  2. Step 2: Convert to fraction form
    149,668.69/206,578.20 = 86,043.46/x
  3. Step 3: Cross multiply
    149,668.69x = 206,578.20 × 86,043.46
  4. Step 4: Simplify right side
    149,668.69x = 17,774,703,088.57
  5. Step 5: Solve for x
    x = 17,774,703,088.57/149,668.69
  6. Step 6: Final answer
    x = 118,760.33

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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.