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Finding the Fourth Proportional to 60,906.60, 84,049.20 and 35,415

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Solution

The fourth proportional to 60,906.60, 84,049.20 and 35,415 is: 48,871.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,906.60 : 84,049.20 = 35,415 : x
  2. Step 2: Convert to fraction form
    60,906.60/84,049.20 = 35,415/x
  3. Step 3: Cross multiply
    60,906.60x = 84,049.20 × 35,415
  4. Step 4: Simplify right side
    60,906.60x = 2,976,602,418
  5. Step 5: Solve for x
    x = 2,976,602,418/60,906.60
  6. Step 6: Final answer
    x = 48,871.59

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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.