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Finding the Fourth Proportional to 129,843.54, 179,188.74 and 75,391.63

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Solution

The fourth proportional to 129,843.54, 179,188.74 and 75,391.63 is: 104,043.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,843.54 : 179,188.74 = 75,391.63 : x
  2. Step 2: Convert to fraction form
    129,843.54/179,188.74 = 75,391.63/x
  3. Step 3: Cross multiply
    129,843.54x = 179,188.74 × 75,391.63
  4. Step 4: Simplify right side
    129,843.54x = 13,509,330,738.27
  5. Step 5: Solve for x
    x = 13,509,330,738.27/129,843.54
  6. Step 6: Final answer
    x = 104,043.15

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1.5x scale

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.