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Finding the Fourth Proportional to 129,997.64, 179,400.02 and 79,724.36

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Solution

The fourth proportional to 129,997.64, 179,400.02 and 79,724.36 is: 110,021.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,997.64 : 179,400.02 = 79,724.36 : x
  2. Step 2: Convert to fraction form
    129,997.64/179,400.02 = 79,724.36/x
  3. Step 3: Cross multiply
    129,997.64x = 179,400.02 × 79,724.36
  4. Step 4: Simplify right side
    129,997.64x = 14,302,551,778.49
  5. Step 5: Solve for x
    x = 14,302,551,778.49/129,997.64
  6. Step 6: Final answer
    x = 110,021.63

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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.