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Finding the Fourth Proportional to 156,877.66, 216,491.08 and 85,257.70

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Solution

The fourth proportional to 156,877.66, 216,491.08 and 85,257.70 is: 117,655.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,877.66 : 216,491.08 = 85,257.70 : x
  2. Step 2: Convert to fraction form
    156,877.66/216,491.08 = 85,257.70/x
  3. Step 3: Cross multiply
    156,877.66x = 216,491.08 × 85,257.70
  4. Step 4: Simplify right side
    156,877.66x = 18,457,530,956.80
  5. Step 5: Solve for x
    x = 18,457,530,956.80/156,877.66
  6. Step 6: Final answer
    x = 117,655.57

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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.