Home / 187,905.20-281,201.70-128,856.20

Finding the Fourth Proportional to 187,905.20, 281,201.70 and 128,856.20

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Solution

The fourth proportional to 187,905.20, 281,201.70 and 128,856.20 is: 192,834.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,905.20 : 281,201.70 = 128,856.20 : x
  2. Step 2: Convert to fraction form
    187,905.20/281,201.70 = 128,856.20/x
  3. Step 3: Cross multiply
    187,905.20x = 281,201.70 × 128,856.20
  4. Step 4: Simplify right side
    187,905.20x = 36,234,582,495.54
  5. Step 5: Solve for x
    x = 36,234,582,495.54/187,905.20
  6. Step 6: Final answer
    x = 192,834.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.