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Finding the Fourth Proportional to 157,876.77, 217,867.40 and 86,255.26

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Solution

The fourth proportional to 157,876.77, 217,867.40 and 86,255.26 is: 119,030.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,876.77 : 217,867.40 = 86,255.26 : x
  2. Step 2: Convert to fraction form
    157,876.77/217,867.40 = 86,255.26/x
  3. Step 3: Cross multiply
    157,876.77x = 217,867.40 × 86,255.26
  4. Step 4: Simplify right side
    157,876.77x = 18,792,209,232.52
  5. Step 5: Solve for x
    x = 18,792,209,232.52/157,876.77
  6. Step 6: Final answer
    x = 119,030.87

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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.