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Finding the Fourth Proportional to 70,693.20, 106,039.80 and 35,701.20

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Solution

The fourth proportional to 70,693.20, 106,039.80 and 35,701.20 is: 53,551.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,693.20 : 106,039.80 = 35,701.20 : x
  2. Step 2: Convert to fraction form
    70,693.20/106,039.80 = 35,701.20/x
  3. Step 3: Cross multiply
    70,693.20x = 106,039.80 × 35,701.20
  4. Step 4: Simplify right side
    70,693.20x = 3,785,748,107.76
  5. Step 5: Solve for x
    x = 3,785,748,107.76/70,693.20
  6. Step 6: Final answer
    x = 53,551.80

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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.