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Finding the Fourth Proportional to 56,670.80, 85,009.40 and 17,229.20

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Solution

The fourth proportional to 56,670.80, 85,009.40 and 17,229.20 is: 25,844.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,670.80 : 85,009.40 = 17,229.20 : x
  2. Step 2: Convert to fraction form
    56,670.80/85,009.40 = 17,229.20/x
  3. Step 3: Cross multiply
    56,670.80x = 85,009.40 × 17,229.20
  4. Step 4: Simplify right side
    56,670.80x = 1,464,643,954.48
  5. Step 5: Solve for x
    x = 1,464,643,954.48/56,670.80
  6. Step 6: Final answer
    x = 25,844.77

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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.