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Finding the Fourth Proportional to 70,459.10, 105,687.06 and 17,151.30

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Solution

The fourth proportional to 70,459.10, 105,687.06 and 17,151.30 is: 25,726.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,459.10 : 105,687.06 = 17,151.30 : x
  2. Step 2: Convert to fraction form
    70,459.10/105,687.06 = 17,151.30/x
  3. Step 3: Cross multiply
    70,459.10x = 105,687.06 × 17,151.30
  4. Step 4: Simplify right side
    70,459.10x = 1,812,670,472.18
  5. Step 5: Solve for x
    x = 1,812,670,472.18/70,459.10
  6. Step 6: Final answer
    x = 25,726.56

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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.