Home / 128,236.05-176,960.25-70,872.41

Finding the Fourth Proportional to 128,236.05, 176,960.25 and 70,872.41

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Solution

The fourth proportional to 128,236.05, 176,960.25 and 70,872.41 is: 97,800.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,236.05 : 176,960.25 = 70,872.41 : x
  2. Step 2: Convert to fraction form
    128,236.05/176,960.25 = 70,872.41/x
  3. Step 3: Cross multiply
    128,236.05x = 176,960.25 × 70,872.41
  4. Step 4: Simplify right side
    128,236.05x = 12,541,599,759.51
  5. Step 5: Solve for x
    x = 12,541,599,759.51/128,236.05
  6. Step 6: Final answer
    x = 97,800.89

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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.