Home / 128,305.80-177,056.43-70,161.48

Finding the Fourth Proportional to 128,305.80, 177,056.43 and 70,161.48

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Solution

The fourth proportional to 128,305.80, 177,056.43 and 70,161.48 is: 96,819.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,305.80 : 177,056.43 = 70,161.48 : x
  2. Step 2: Convert to fraction form
    128,305.80/177,056.43 = 70,161.48/x
  3. Step 3: Cross multiply
    128,305.80x = 177,056.43 × 70,161.48
  4. Step 4: Simplify right side
    128,305.80x = 12,422,541,172.32
  5. Step 5: Solve for x
    x = 12,422,541,172.32/128,305.80
  6. Step 6: Final answer
    x = 96,819.79

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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.