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Finding the Fourth Proportional to 149,381.56, 206,081.76 and 88,918.28

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Solution

The fourth proportional to 149,381.56, 206,081.76 and 88,918.28 is: 122,668.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,381.56 : 206,081.76 = 88,918.28 : x
  2. Step 2: Convert to fraction form
    149,381.56/206,081.76 = 88,918.28/x
  3. Step 3: Cross multiply
    149,381.56x = 206,081.76 × 88,918.28
  4. Step 4: Simplify right side
    149,381.56x = 18,324,435,638.57
  5. Step 5: Solve for x
    x = 18,324,435,638.57/149,381.56
  6. Step 6: Final answer
    x = 122,668.66

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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.