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Finding the Fourth Proportional to 84,018.15, 125,731.06 and 52,443.03

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Solution

The fourth proportional to 84,018.15, 125,731.06 and 52,443.03 is: 78,479.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,018.15 : 125,731.06 = 52,443.03 : x
  2. Step 2: Convert to fraction form
    84,018.15/125,731.06 = 52,443.03/x
  3. Step 3: Cross multiply
    84,018.15x = 125,731.06 × 52,443.03
  4. Step 4: Simplify right side
    84,018.15x = 6,593,717,751.51
  5. Step 5: Solve for x
    x = 6,593,717,751.51/84,018.15
  6. Step 6: Final answer
    x = 78,479.68

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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.