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Finding the Fourth Proportional to 192,814.80, 289,281.28 and 86,288.40

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Solution

The fourth proportional to 192,814.80, 289,281.28 and 86,288.40 is: 129,459.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,814.80 : 289,281.28 = 86,288.40 : x
  2. Step 2: Convert to fraction form
    192,814.80/289,281.28 = 86,288.40/x
  3. Step 3: Cross multiply
    192,814.80x = 289,281.28 × 86,288.40
  4. Step 4: Simplify right side
    192,814.80x = 24,961,618,801.15
  5. Step 5: Solve for x
    x = 24,961,618,801.15/192,814.80
  6. Step 6: Final answer
    x = 129,459.04

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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.