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Finding the Fourth Proportional to 191,858.80, 288,047.40 and 121,874.80

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Solution

The fourth proportional to 191,858.80, 288,047.40 and 121,874.80 is: 182,976.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,858.80 : 288,047.40 = 121,874.80 : x
  2. Step 2: Convert to fraction form
    191,858.80/288,047.40 = 121,874.80/x
  3. Step 3: Cross multiply
    191,858.80x = 288,047.40 × 121,874.80
  4. Step 4: Simplify right side
    191,858.80x = 35,105,719,265.52
  5. Step 5: Solve for x
    x = 35,105,719,265.52/191,858.80
  6. Step 6: Final answer
    x = 182,976.85

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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.