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Finding the Fourth Proportional to 99,548.45, 137,405.09 and 65,581.73

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Solution

The fourth proportional to 99,548.45, 137,405.09 and 65,581.73 is: 90,521.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,548.45 : 137,405.09 = 65,581.73 : x
  2. Step 2: Convert to fraction form
    99,548.45/137,405.09 = 65,581.73/x
  3. Step 3: Cross multiply
    99,548.45x = 137,405.09 × 65,581.73
  4. Step 4: Simplify right side
    99,548.45x = 9,011,263,513.01
  5. Step 5: Solve for x
    x = 9,011,263,513.01/99,548.45
  6. Step 6: Final answer
    x = 90,521.38

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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.