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Finding the Fourth Proportional to 191,856.80, 288,044.40 and 121,872.80

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Solution

The fourth proportional to 191,856.80, 288,044.40 and 121,872.80 is: 182,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,856.80 : 288,044.40 = 121,872.80 : x
  2. Step 2: Convert to fraction form
    191,856.80/288,044.40 = 121,872.80/x
  3. Step 3: Cross multiply
    191,856.80x = 288,044.40 × 121,872.80
  4. Step 4: Simplify right side
    191,856.80x = 35,104,777,552.32
  5. Step 5: Solve for x
    x = 35,104,777,552.32/191,856.80
  6. Step 6: Final answer
    x = 182,973.85

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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.