Home / 129,738.72-179,039.36-70,122.72

Finding the Fourth Proportional to 129,738.72, 179,039.36 and 70,122.72

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Solution

The fourth proportional to 129,738.72, 179,039.36 and 70,122.72 is: 96,769.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,738.72 : 179,039.36 = 70,122.72 : x
  2. Step 2: Convert to fraction form
    129,738.72/179,039.36 = 70,122.72/x
  3. Step 3: Cross multiply
    129,738.72x = 179,039.36 × 70,122.72
  4. Step 4: Simplify right side
    129,738.72x = 12,554,726,910.26
  5. Step 5: Solve for x
    x = 12,554,726,910.26/129,738.72
  6. Step 6: Final answer
    x = 96,769.31

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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.