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Finding the Fourth Proportional to 129,728.84, 179,018.84 and 73,136.57

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Solution

The fourth proportional to 129,728.84, 179,018.84 and 73,136.57 is: 100,924.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,728.84 : 179,018.84 = 73,136.57 : x
  2. Step 2: Convert to fraction form
    129,728.84/179,018.84 = 73,136.57/x
  3. Step 3: Cross multiply
    129,728.84x = 179,018.84 × 73,136.57
  4. Step 4: Simplify right side
    129,728.84x = 13,092,823,922.98
  5. Step 5: Solve for x
    x = 13,092,823,922.98/129,728.84
  6. Step 6: Final answer
    x = 100,924.54

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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.