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Finding the Fourth Proportional to 86,909.34, 119,872.98 and 79,762.26

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Solution

The fourth proportional to 86,909.34, 119,872.98 and 79,762.26 is: 110,015.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,909.34 : 119,872.98 = 79,762.26 : x
  2. Step 2: Convert to fraction form
    86,909.34/119,872.98 = 79,762.26/x
  3. Step 3: Cross multiply
    86,909.34x = 119,872.98 × 79,762.26
  4. Step 4: Simplify right side
    86,909.34x = 9,561,339,797.73
  5. Step 5: Solve for x
    x = 9,561,339,797.73/86,909.34
  6. Step 6: Final answer
    x = 110,015.10

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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.