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Finding the Fourth Proportional to 266,153.77, 399,293.58 and 86,238.89

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Solution

The fourth proportional to 266,153.77, 399,293.58 and 86,238.89 is: 129,378.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,153.77 : 399,293.58 = 86,238.89 : x
  2. Step 2: Convert to fraction form
    266,153.77/399,293.58 = 86,238.89/x
  3. Step 3: Cross multiply
    266,153.77x = 399,293.58 × 86,238.89
  4. Step 4: Simplify right side
    266,153.77x = 34,434,636,708.54
  5. Step 5: Solve for x
    x = 34,434,636,708.54/266,153.77
  6. Step 6: Final answer
    x = 129,378.73

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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.