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Finding the Fourth Proportional to 156,900.81, 216,524.44 and 85,280.82

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Solution

The fourth proportional to 156,900.81, 216,524.44 and 85,280.82 is: 117,688.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,900.81 : 216,524.44 = 85,280.82 : x
  2. Step 2: Convert to fraction form
    156,900.81/216,524.44 = 85,280.82/x
  3. Step 3: Cross multiply
    156,900.81x = 216,524.44 × 85,280.82
  4. Step 4: Simplify right side
    156,900.81x = 18,465,381,087.88
  5. Step 5: Solve for x
    x = 18,465,381,087.88/156,900.81
  6. Step 6: Final answer
    x = 117,688.24

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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.