Home / 81,981.85-113,187.20-66,910.47

Finding the Fourth Proportional to 81,981.85, 113,187.20 and 66,910.47

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Solution

The fourth proportional to 81,981.85, 113,187.20 and 66,910.47 is: 92,379.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.85 : 113,187.20 = 66,910.47 : x
  2. Step 2: Convert to fraction form
    81,981.85/113,187.20 = 66,910.47/x
  3. Step 3: Cross multiply
    81,981.85x = 113,187.20 × 66,910.47
  4. Step 4: Simplify right side
    81,981.85x = 7,573,408,749.98
  5. Step 5: Solve for x
    x = 7,573,408,749.98/81,981.85
  6. Step 6: Final answer
    x = 92,379.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.