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Finding the Fourth Proportional to 156,992.48, 216,650.64 and 85,373.28

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Solution

The fourth proportional to 156,992.48, 216,650.64 and 85,373.28 is: 117,815.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,992.48 : 216,650.64 = 85,373.28 : x
  2. Step 2: Convert to fraction form
    156,992.48/216,650.64 = 85,373.28/x
  3. Step 3: Cross multiply
    156,992.48x = 216,650.64 × 85,373.28
  4. Step 4: Simplify right side
    156,992.48x = 18,496,175,750.90
  5. Step 5: Solve for x
    x = 18,496,175,750.90/156,992.48
  6. Step 6: Final answer
    x = 117,815.68

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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.