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Finding the Fourth Proportional to 189,622.81, 261,676.82 and 103,580.76

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Solution

The fourth proportional to 189,622.81, 261,676.82 and 103,580.76 is: 142,940.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,622.81 : 261,676.82 = 103,580.76 : x
  2. Step 2: Convert to fraction form
    189,622.81/261,676.82 = 103,580.76/x
  3. Step 3: Cross multiply
    189,622.81x = 261,676.82 × 103,580.76
  4. Step 4: Simplify right side
    189,622.81x = 27,104,683,889.98
  5. Step 5: Solve for x
    x = 27,104,683,889.98/189,622.81
  6. Step 6: Final answer
    x = 142,940.00

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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.