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Finding the Fourth Proportional to 157,856.33, 217,856.76 and 86,247.11

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Solution

The fourth proportional to 157,856.33, 217,856.76 and 86,247.11 is: 119,029.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,856.33 : 217,856.76 = 86,247.11 : x
  2. Step 2: Convert to fraction form
    157,856.33/217,856.76 = 86,247.11/x
  3. Step 3: Cross multiply
    157,856.33x = 217,856.76 × 86,247.11
  4. Step 4: Simplify right side
    157,856.33x = 18,789,515,943.96
  5. Step 5: Solve for x
    x = 18,789,515,943.96/157,856.33
  6. Step 6: Final answer
    x = 119,029.22

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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.