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Finding the Fourth Proportional to 157,879.78, 217,877.23 and 86,264.24

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Solution

The fourth proportional to 157,879.78, 217,877.23 and 86,264.24 is: 119,046.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,879.78 : 217,877.23 = 86,264.24 : x
  2. Step 2: Convert to fraction form
    157,879.78/217,877.23 = 86,264.24/x
  3. Step 3: Cross multiply
    157,879.78x = 217,877.23 × 86,264.24
  4. Step 4: Simplify right side
    157,879.78x = 18,795,013,659.26
  5. Step 5: Solve for x
    x = 18,795,013,659.26/157,879.78
  6. Step 6: Final answer
    x = 119,046.36

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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.