Home / 129,728.36-179,022.76-73,139.80

Finding the Fourth Proportional to 129,728.36, 179,022.76 and 73,139.80

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Solution

The fourth proportional to 129,728.36, 179,022.76 and 73,139.80 is: 100,931.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,728.36 : 179,022.76 = 73,139.80 : x
  2. Step 2: Convert to fraction form
    129,728.36/179,022.76 = 73,139.80/x
  3. Step 3: Cross multiply
    129,728.36x = 179,022.76 × 73,139.80
  4. Step 4: Simplify right side
    129,728.36x = 13,093,688,861.85
  5. Step 5: Solve for x
    x = 13,093,688,861.85/129,728.36
  6. Step 6: Final answer
    x = 100,931.58

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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.