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Finding the Fourth Proportional to 70,877.70, 106,207.20 and 61,473.60

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Solution

The fourth proportional to 70,877.70, 106,207.20 and 61,473.60 is: 92,115.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,877.70 : 106,207.20 = 61,473.60 : x
  2. Step 2: Convert to fraction form
    70,877.70/106,207.20 = 61,473.60/x
  3. Step 3: Cross multiply
    70,877.70x = 106,207.20 × 61,473.60
  4. Step 4: Simplify right side
    70,877.70x = 6,528,938,929.92
  5. Step 5: Solve for x
    x = 6,528,938,929.92/70,877.70
  6. Step 6: Final answer
    x = 92,115.56

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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.