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Finding the Fourth Proportional to 156,908.86, 216,538.44 and 85,293.70

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Solution

The fourth proportional to 156,908.86, 216,538.44 and 85,293.70 is: 117,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,908.86 : 216,538.44 = 85,293.70 : x
  2. Step 2: Convert to fraction form
    156,908.86/216,538.44 = 85,293.70/x
  3. Step 3: Cross multiply
    156,908.86x = 216,538.44 × 85,293.70
  4. Step 4: Simplify right side
    156,908.86x = 18,469,364,739.83
  5. Step 5: Solve for x
    x = 18,469,364,739.83/156,908.86
  6. Step 6: Final answer
    x = 117,707.60

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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.