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Finding the Fourth Proportional to 156,636.89, 216,158.93 and 85,016.89

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Solution

The fourth proportional to 156,636.89, 216,158.93 and 85,016.89 is: 117,323.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,636.89 : 216,158.93 = 85,016.89 : x
  2. Step 2: Convert to fraction form
    156,636.89/216,158.93 = 85,016.89/x
  3. Step 3: Cross multiply
    156,636.89x = 216,158.93 × 85,016.89
  4. Step 4: Simplify right side
    156,636.89x = 18,377,160,138.26
  5. Step 5: Solve for x
    x = 18,377,160,138.26/156,636.89
  6. Step 6: Final answer
    x = 117,323.32

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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.