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Finding the Fourth Proportional to 157,781.54, 217,737.42 and 86,161.56

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Solution

The fourth proportional to 157,781.54, 217,737.42 and 86,161.56 is: 118,902.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,781.54 : 217,737.42 = 86,161.56 : x
  2. Step 2: Convert to fraction form
    157,781.54/217,737.42 = 86,161.56/x
  3. Step 3: Cross multiply
    157,781.54x = 217,737.42 × 86,161.56
  4. Step 4: Simplify right side
    157,781.54x = 18,760,596,654.40
  5. Step 5: Solve for x
    x = 18,760,596,654.40/157,781.54
  6. Step 6: Final answer
    x = 118,902.35

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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.