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Finding the Fourth Proportional to 84,607.11, 126,821.34 and 28,393.92

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Solution

The fourth proportional to 84,607.11, 126,821.34 and 28,393.92 is: 42,560.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,607.11 : 126,821.34 = 28,393.92 : x
  2. Step 2: Convert to fraction form
    84,607.11/126,821.34 = 28,393.92/x
  3. Step 3: Cross multiply
    84,607.11x = 126,821.34 × 28,393.92
  4. Step 4: Simplify right side
    84,607.11x = 3,600,954,982.25
  5. Step 5: Solve for x
    x = 3,600,954,982.25/84,607.11
  6. Step 6: Final answer
    x = 42,560.90

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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.