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Finding the Fourth Proportional to 159,959.64, 240,085.74 and 81,128.28

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Solution

The fourth proportional to 159,959.64, 240,085.74 and 81,128.28 is: 121,766.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,959.64 : 240,085.74 = 81,128.28 : x
  2. Step 2: Convert to fraction form
    159,959.64/240,085.74 = 81,128.28/x
  3. Step 3: Cross multiply
    159,959.64x = 240,085.74 × 81,128.28
  4. Step 4: Simplify right side
    159,959.64x = 19,477,743,138.73
  5. Step 5: Solve for x
    x = 19,477,743,138.73/159,959.64
  6. Step 6: Final answer
    x = 121,766.61

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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.