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Finding the Fourth Proportional to 191,451.17, 286,917.96 and 138,234.17

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Solution

The fourth proportional to 191,451.17, 286,917.96 and 138,234.17 is: 207,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,451.17 : 286,917.96 = 138,234.17 : x
  2. Step 2: Convert to fraction form
    191,451.17/286,917.96 = 138,234.17/x
  3. Step 3: Cross multiply
    191,451.17x = 286,917.96 × 138,234.17
  4. Step 4: Simplify right side
    191,451.17x = 39,661,866,058.69
  5. Step 5: Solve for x
    x = 39,661,866,058.69/191,451.17
  6. Step 6: Final answer
    x = 207,164.40

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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.