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Finding the Fourth Proportional to 191,712.60, 287,568.90 and 107,731.80

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Solution

The fourth proportional to 191,712.60, 287,568.90 and 107,731.80 is: 161,597.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,712.60 : 287,568.90 = 107,731.80 : x
  2. Step 2: Convert to fraction form
    191,712.60/287,568.90 = 107,731.80/x
  3. Step 3: Cross multiply
    191,712.60x = 287,568.90 × 107,731.80
  4. Step 4: Simplify right side
    191,712.60x = 30,980,315,221.02
  5. Step 5: Solve for x
    x = 30,980,315,221.02/191,712.60
  6. Step 6: Final answer
    x = 161,597.70

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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.