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Finding the Fourth Proportional to 157,812.58, 217,778 and 86,192.90

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Solution

The fourth proportional to 157,812.58, 217,778 and 86,192.90 is: 118,944.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,812.58 : 217,778 = 86,192.90 : x
  2. Step 2: Convert to fraction form
    157,812.58/217,778 = 86,192.90/x
  3. Step 3: Cross multiply
    157,812.58x = 217,778 × 86,192.90
  4. Step 4: Simplify right side
    157,812.58x = 18,770,917,376.20
  5. Step 5: Solve for x
    x = 18,770,917,376.20/157,812.58
  6. Step 6: Final answer
    x = 118,944.37

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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.