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Finding the Fourth Proportional to 115,408.30, 173,112.45 and 99,856.30

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Solution

The fourth proportional to 115,408.30, 173,112.45 and 99,856.30 is: 149,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,408.30 : 173,112.45 = 99,856.30 : x
  2. Step 2: Convert to fraction form
    115,408.30/173,112.45 = 99,856.30/x
  3. Step 3: Cross multiply
    115,408.30x = 173,112.45 × 99,856.30
  4. Step 4: Simplify right side
    115,408.30x = 17,286,368,740.94
  5. Step 5: Solve for x
    x = 17,286,368,740.94/115,408.30
  6. Step 6: Final answer
    x = 149,784.45

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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.