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Finding the Fourth Proportional to 353,018.98, 529,523.91 and 86,781.80

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Solution

The fourth proportional to 353,018.98, 529,523.91 and 86,781.80 is: 130,171.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,018.98 : 529,523.91 = 86,781.80 : x
  2. Step 2: Convert to fraction form
    353,018.98/529,523.91 = 86,781.80/x
  3. Step 3: Cross multiply
    353,018.98x = 529,523.91 × 86,781.80
  4. Step 4: Simplify right side
    353,018.98x = 45,953,038,052.84
  5. Step 5: Solve for x
    x = 45,953,038,052.84/353,018.98
  6. Step 6: Final answer
    x = 130,171.58

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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.