Home / 187,905.70-281,202.45-128,856.70

Finding the Fourth Proportional to 187,905.70, 281,202.45 and 128,856.70

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Solution

The fourth proportional to 187,905.70, 281,202.45 and 128,856.70 is: 192,835.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,905.70 : 281,202.45 = 128,856.70 : x
  2. Step 2: Convert to fraction form
    187,905.70/281,202.45 = 128,856.70/x
  3. Step 3: Cross multiply
    187,905.70x = 281,202.45 × 128,856.70
  4. Step 4: Simplify right side
    187,905.70x = 36,234,819,738.92
  5. Step 5: Solve for x
    x = 36,234,819,738.92/187,905.70
  6. Step 6: Final answer
    x = 192,835.13

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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.