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Finding the Fourth Proportional to 115,418.70, 173,136.15 and 65,522.70

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Solution

The fourth proportional to 115,418.70, 173,136.15 and 65,522.70 is: 98,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,418.70 : 173,136.15 = 65,522.70 : x
  2. Step 2: Convert to fraction form
    115,418.70/173,136.15 = 65,522.70/x
  3. Step 3: Cross multiply
    115,418.70x = 173,136.15 × 65,522.70
  4. Step 4: Simplify right side
    115,418.70x = 11,344,348,015.61
  5. Step 5: Solve for x
    x = 11,344,348,015.61/115,418.70
  6. Step 6: Final answer
    x = 98,288.65

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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.