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Finding the Fourth Proportional to 70,178.97, 105,275.10 and 19,581.36

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Solution

The fourth proportional to 70,178.97, 105,275.10 and 19,581.36 is: 29,373.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,178.97 : 105,275.10 = 19,581.36 : x
  2. Step 2: Convert to fraction form
    70,178.97/105,275.10 = 19,581.36/x
  3. Step 3: Cross multiply
    70,178.97x = 105,275.10 × 19,581.36
  4. Step 4: Simplify right side
    70,178.97x = 2,061,429,632.14
  5. Step 5: Solve for x
    x = 2,061,429,632.14/70,178.97
  6. Step 6: Final answer
    x = 29,373.89

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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.