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Finding the Fourth Proportional to 81,113.67, 121,500.86 and 65,232.95

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Solution

The fourth proportional to 81,113.67, 121,500.86 and 65,232.95 is: 97,712.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,113.67 : 121,500.86 = 65,232.95 : x
  2. Step 2: Convert to fraction form
    81,113.67/121,500.86 = 65,232.95/x
  3. Step 3: Cross multiply
    81,113.67x = 121,500.86 × 65,232.95
  4. Step 4: Simplify right side
    81,113.67x = 7,925,858,591.67
  5. Step 5: Solve for x
    x = 7,925,858,591.67/81,113.67
  6. Step 6: Final answer
    x = 97,712.98

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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.