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Finding the Fourth Proportional to 86,259.78, 129,389.67 and 23,930.28

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Solution

The fourth proportional to 86,259.78, 129,389.67 and 23,930.28 is: 35,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,259.78 : 129,389.67 = 23,930.28 : x
  2. Step 2: Convert to fraction form
    86,259.78/129,389.67 = 23,930.28/x
  3. Step 3: Cross multiply
    86,259.78x = 129,389.67 × 23,930.28
  4. Step 4: Simplify right side
    86,259.78x = 3,096,331,032.21
  5. Step 5: Solve for x
    x = 3,096,331,032.21/86,259.78
  6. Step 6: Final answer
    x = 35,895.42

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.