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Finding the Fourth Proportional to 70,917.20, 97,866 and 42,623.36

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Solution

The fourth proportional to 70,917.20, 97,866 and 42,623.36 is: 58,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,917.20 : 97,866 = 42,623.36 : x
  2. Step 2: Convert to fraction form
    70,917.20/97,866 = 42,623.36/x
  3. Step 3: Cross multiply
    70,917.20x = 97,866 × 42,623.36
  4. Step 4: Simplify right side
    70,917.20x = 4,171,377,749.76
  5. Step 5: Solve for x
    x = 4,171,377,749.76/70,917.20
  6. Step 6: Final answer
    x = 58,820.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.