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Finding the Fourth Proportional to 86,553.84, 129,489.13 and 65,554.39

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Solution

The fourth proportional to 86,553.84, 129,489.13 and 65,554.39 is: 98,072.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,553.84 : 129,489.13 = 65,554.39 : x
  2. Step 2: Convert to fraction form
    86,553.84/129,489.13 = 65,554.39/x
  3. Step 3: Cross multiply
    86,553.84x = 129,489.13 × 65,554.39
  4. Step 4: Simplify right side
    86,553.84x = 8,488,579,953.56
  5. Step 5: Solve for x
    x = 8,488,579,953.56/86,553.84
  6. Step 6: Final answer
    x = 98,072.83

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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.