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Finding the Fourth Proportional to 353,154.79, 530,065.09 and 128,732.14

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Solution

The fourth proportional to 353,154.79, 530,065.09 and 128,732.14 is: 193,219.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,154.79 : 530,065.09 = 128,732.14 : x
  2. Step 2: Convert to fraction form
    353,154.79/530,065.09 = 128,732.14/x
  3. Step 3: Cross multiply
    353,154.79x = 530,065.09 × 128,732.14
  4. Step 4: Simplify right side
    353,154.79x = 68,236,413,374.99
  5. Step 5: Solve for x
    x = 68,236,413,374.99/353,154.79
  6. Step 6: Final answer
    x = 193,219.56

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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.