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Finding the Fourth Proportional to 154,386.30, 231,601.05 and 65,639.10

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Solution

The fourth proportional to 154,386.30, 231,601.05 and 65,639.10 is: 98,467.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,386.30 : 231,601.05 = 65,639.10 : x
  2. Step 2: Convert to fraction form
    154,386.30/231,601.05 = 65,639.10/x
  3. Step 3: Cross multiply
    154,386.30x = 231,601.05 × 65,639.10
  4. Step 4: Simplify right side
    154,386.30x = 15,202,084,481.06
  5. Step 5: Solve for x
    x = 15,202,084,481.06/154,386.30
  6. Step 6: Final answer
    x = 98,467.83

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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.