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Finding the Fourth Proportional to 157,876.69, 217,872.96 and 86,261.15

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Solution

The fourth proportional to 157,876.69, 217,872.96 and 86,261.15 is: 119,042.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,876.69 : 217,872.96 = 86,261.15 : x
  2. Step 2: Convert to fraction form
    157,876.69/217,872.96 = 86,261.15/x
  3. Step 3: Cross multiply
    157,876.69x = 217,872.96 × 86,261.15
  4. Step 4: Simplify right side
    157,876.69x = 18,793,972,083.50
  5. Step 5: Solve for x
    x = 18,793,972,083.50/157,876.69
  6. Step 6: Final answer
    x = 119,042.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.