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Finding the Fourth Proportional to 87,682.92, 120,973.88 and 53,655.90

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Solution

The fourth proportional to 87,682.92, 120,973.88 and 53,655.90 is: 74,027.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,682.92 : 120,973.88 = 53,655.90 : x
  2. Step 2: Convert to fraction form
    87,682.92/120,973.88 = 53,655.90/x
  3. Step 3: Cross multiply
    87,682.92x = 120,973.88 × 53,655.90
  4. Step 4: Simplify right side
    87,682.92x = 6,490,962,139.61
  5. Step 5: Solve for x
    x = 6,490,962,139.61/87,682.92
  6. Step 6: Final answer
    x = 74,027.67

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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.