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Finding the Fourth Proportional to 156,641.54, 216,165.51 and 85,021.54

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Solution

The fourth proportional to 156,641.54, 216,165.51 and 85,021.54 is: 117,329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,641.54 : 216,165.51 = 85,021.54 : x
  2. Step 2: Convert to fraction form
    156,641.54/216,165.51 = 85,021.54/x
  3. Step 3: Cross multiply
    156,641.54x = 216,165.51 × 85,021.54
  4. Step 4: Simplify right side
    156,641.54x = 18,378,724,014.67
  5. Step 5: Solve for x
    x = 18,378,724,014.67/156,641.54
  6. Step 6: Final answer
    x = 117,329.83

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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.