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Finding the Fourth Proportional to 84,638.64, 126,958.41 and 25,473.90

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Solution

The fourth proportional to 84,638.64, 126,958.41 and 25,473.90 is: 38,210.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,638.64 : 126,958.41 = 25,473.90 : x
  2. Step 2: Convert to fraction form
    84,638.64/126,958.41 = 25,473.90/x
  3. Step 3: Cross multiply
    84,638.64x = 126,958.41 × 25,473.90
  4. Step 4: Simplify right side
    84,638.64x = 3,234,125,840.50
  5. Step 5: Solve for x
    x = 3,234,125,840.50/84,638.64
  6. Step 6: Final answer
    x = 38,210.99

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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.