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Finding the Fourth Proportional to 86,906.10, 130,359.15 and 86,906.10

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Solution

The fourth proportional to 86,906.10, 130,359.15 and 86,906.10 is: 130,359.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,906.10 : 130,359.15 = 86,906.10 : x
  2. Step 2: Convert to fraction form
    86,906.10/130,359.15 = 86,906.10/x
  3. Step 3: Cross multiply
    86,906.10x = 130,359.15 × 86,906.10
  4. Step 4: Simplify right side
    86,906.10x = 11,329,005,325.82
  5. Step 5: Solve for x
    x = 11,329,005,325.82/86,906.10
  6. Step 6: Final answer
    x = 130,359.15

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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.