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Finding the Fourth Proportional to 191,840.30, 288,019.65 and 121,856.30

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Solution

The fourth proportional to 191,840.30, 288,019.65 and 121,856.30 is: 182,949.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,840.30 : 288,019.65 = 121,856.30 : x
  2. Step 2: Convert to fraction form
    191,840.30/288,019.65 = 121,856.30/x
  3. Step 3: Cross multiply
    191,840.30x = 288,019.65 × 121,856.30
  4. Step 4: Simplify right side
    191,840.30x = 35,097,008,876.30
  5. Step 5: Solve for x
    x = 35,097,008,876.30/191,840.30
  6. Step 6: Final answer
    x = 182,949.09

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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.