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Finding the Fourth Proportional to 156,659.81, 216,194.46 and 85,039.83

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Solution

The fourth proportional to 156,659.81, 216,194.46 and 85,039.83 is: 117,357.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,659.81 : 216,194.46 = 85,039.83 : x
  2. Step 2: Convert to fraction form
    156,659.81/216,194.46 = 85,039.83/x
  3. Step 3: Cross multiply
    156,659.81x = 216,194.46 × 85,039.83
  4. Step 4: Simplify right side
    156,659.81x = 18,385,138,619.17
  5. Step 5: Solve for x
    x = 18,385,138,619.17/156,659.81
  6. Step 6: Final answer
    x = 117,357.08

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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.