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Finding the Fourth Proportional to 115,503.99, 172,944.48 and 75,423.69

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Solution

The fourth proportional to 115,503.99, 172,944.48 and 75,423.69 is: 112,932.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,503.99 : 172,944.48 = 75,423.69 : x
  2. Step 2: Convert to fraction form
    115,503.99/172,944.48 = 75,423.69/x
  3. Step 3: Cross multiply
    115,503.99x = 172,944.48 × 75,423.69
  4. Step 4: Simplify right side
    115,503.99x = 13,044,110,846.73
  5. Step 5: Solve for x
    x = 13,044,110,846.73/115,503.99
  6. Step 6: Final answer
    x = 112,932.12

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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.