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Finding the Fourth Proportional to 86,326.58, 129,609.12 and 59,609.87

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Solution

The fourth proportional to 86,326.58, 129,609.12 and 59,609.87 is: 89,497.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,326.58 : 129,609.12 = 59,609.87 : x
  2. Step 2: Convert to fraction form
    86,326.58/129,609.12 = 59,609.87/x
  3. Step 3: Cross multiply
    86,326.58x = 129,609.12 × 59,609.87
  4. Step 4: Simplify right side
    86,326.58x = 7,725,982,794.01
  5. Step 5: Solve for x
    x = 7,725,982,794.01/86,326.58
  6. Step 6: Final answer
    x = 89,497.15

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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.