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Finding the Fourth Proportional to 115,161.50, 172,578.90 and 65,136.61

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Solution

The fourth proportional to 115,161.50, 172,578.90 and 65,136.61 is: 97,612.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,161.50 : 172,578.90 = 65,136.61 : x
  2. Step 2: Convert to fraction form
    115,161.50/172,578.90 = 65,136.61/x
  3. Step 3: Cross multiply
    115,161.50x = 172,578.90 × 65,136.61
  4. Step 4: Simplify right side
    115,161.50x = 11,241,203,992.76
  5. Step 5: Solve for x
    x = 11,241,203,992.76/115,161.50
  6. Step 6: Final answer
    x = 97,612.52

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1.5x scale

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.