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Finding the Fourth Proportional to 159,958.43, 240,085.25 and 81,128.02

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Solution

The fourth proportional to 159,958.43, 240,085.25 and 81,128.02 is: 121,766.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,958.43 : 240,085.25 = 81,128.02 : x
  2. Step 2: Convert to fraction form
    159,958.43/240,085.25 = 81,128.02/x
  3. Step 3: Cross multiply
    159,958.43x = 240,085.25 × 81,128.02
  4. Step 4: Simplify right side
    159,958.43x = 19,477,640,566.31
  5. Step 5: Solve for x
    x = 19,477,640,566.31/159,958.43
  6. Step 6: Final answer
    x = 121,766.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.