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Finding the Fourth Proportional to 92,898.68, 139,395.68 and 45,512.88

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Solution

The fourth proportional to 92,898.68, 139,395.68 and 45,512.88 is: 68,292.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,898.68 : 139,395.68 = 45,512.88 : x
  2. Step 2: Convert to fraction form
    92,898.68/139,395.68 = 45,512.88/x
  3. Step 3: Cross multiply
    92,898.68x = 139,395.68 × 45,512.88
  4. Step 4: Simplify right side
    92,898.68x = 6,344,298,856.36
  5. Step 5: Solve for x
    x = 6,344,298,856.36/92,898.68
  6. Step 6: Final answer
    x = 68,292.67

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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.