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Finding the Fourth Proportional to 156,611.19, 216,123.59 and 84,991.22

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Solution

The fourth proportional to 156,611.19, 216,123.59 and 84,991.22 is: 117,287.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,611.19 : 216,123.59 = 84,991.22 : x
  2. Step 2: Convert to fraction form
    156,611.19/216,123.59 = 84,991.22/x
  3. Step 3: Cross multiply
    156,611.19x = 216,123.59 × 84,991.22
  4. Step 4: Simplify right side
    156,611.19x = 18,368,607,584.88
  5. Step 5: Solve for x
    x = 18,368,607,584.88/156,611.19
  6. Step 6: Final answer
    x = 117,287.96

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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.