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Finding the Fourth Proportional to 56,712.59, 85,081.59 and 17,272.79

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Solution

The fourth proportional to 56,712.59, 85,081.59 and 17,272.79 is: 25,913.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,712.59 : 85,081.59 = 17,272.79 : x
  2. Step 2: Convert to fraction form
    56,712.59/85,081.59 = 17,272.79/x
  3. Step 3: Cross multiply
    56,712.59x = 85,081.59 × 17,272.79
  4. Step 4: Simplify right side
    56,712.59x = 1,469,596,011.53
  5. Step 5: Solve for x
    x = 1,469,596,011.53/56,712.59
  6. Step 6: Final answer
    x = 25,913.05

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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.