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Finding the Fourth Proportional to 156,611.69, 216,124.28 and 84,991.73

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Solution

The fourth proportional to 156,611.69, 216,124.28 and 84,991.73 is: 117,288.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,611.69 : 216,124.28 = 84,991.73 : x
  2. Step 2: Convert to fraction form
    156,611.69/216,124.28 = 84,991.73/x
  3. Step 3: Cross multiply
    156,611.69x = 216,124.28 × 84,991.73
  4. Step 4: Simplify right side
    156,611.69x = 18,368,776,452.20
  5. Step 5: Solve for x
    x = 18,368,776,452.20/156,611.69
  6. Step 6: Final answer
    x = 117,288.67

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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.