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Finding the Fourth Proportional to 156,365.87, 215,784.81 and 84,745.85

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Solution

The fourth proportional to 156,365.87, 215,784.81 and 84,745.85 is: 116,949.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,365.87 : 215,784.81 = 84,745.85 : x
  2. Step 2: Convert to fraction form
    156,365.87/215,784.81 = 84,745.85/x
  3. Step 3: Cross multiply
    156,365.87x = 215,784.81 × 84,745.85
  4. Step 4: Simplify right side
    156,365.87x = 18,286,866,061.61
  5. Step 5: Solve for x
    x = 18,286,866,061.61/156,365.87
  6. Step 6: Final answer
    x = 116,949.22

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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.