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Finding the Fourth Proportional to 129,908.88, 179,270.81 and 72,546.62

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Solution

The fourth proportional to 129,908.88, 179,270.81 and 72,546.62 is: 100,112.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,908.88 : 179,270.81 = 72,546.62 : x
  2. Step 2: Convert to fraction form
    129,908.88/179,270.81 = 72,546.62/x
  3. Step 3: Cross multiply
    129,908.88x = 179,270.81 × 72,546.62
  4. Step 4: Simplify right side
    129,908.88x = 13,005,490,343.12
  5. Step 5: Solve for x
    x = 13,005,490,343.12/129,908.88
  6. Step 6: Final answer
    x = 100,112.40

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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.