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Finding the Fourth Proportional to 191,659.80, 287,489.70 and 86,683.80

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Solution

The fourth proportional to 191,659.80, 287,489.70 and 86,683.80 is: 130,025.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,659.80 : 287,489.70 = 86,683.80 : x
  2. Step 2: Convert to fraction form
    191,659.80/287,489.70 = 86,683.80/x
  3. Step 3: Cross multiply
    191,659.80x = 287,489.70 × 86,683.80
  4. Step 4: Simplify right side
    191,659.80x = 24,920,699,656.86
  5. Step 5: Solve for x
    x = 24,920,699,656.86/191,659.80
  6. Step 6: Final answer
    x = 130,025.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.