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Finding the Fourth Proportional to 191,805.30, 288,010.35 and 112,979.70

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Solution

The fourth proportional to 191,805.30, 288,010.35 and 112,979.70 is: 169,647.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,805.30 : 288,010.35 = 112,979.70 : x
  2. Step 2: Convert to fraction form
    191,805.30/288,010.35 = 112,979.70/x
  3. Step 3: Cross multiply
    191,805.30x = 288,010.35 × 112,979.70
  4. Step 4: Simplify right side
    191,805.30x = 32,539,322,939.90
  5. Step 5: Solve for x
    x = 32,539,322,939.90/191,805.30
  6. Step 6: Final answer
    x = 169,647.67

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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.