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Finding the Fourth Proportional to 84,704.32, 127,052.84 and 28,540.72

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Solution

The fourth proportional to 84,704.32, 127,052.84 and 28,540.72 is: 42,809.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,704.32 : 127,052.84 = 28,540.72 : x
  2. Step 2: Convert to fraction form
    84,704.32/127,052.84 = 28,540.72/x
  3. Step 3: Cross multiply
    84,704.32x = 127,052.84 × 28,540.72
  4. Step 4: Simplify right side
    84,704.32x = 3,626,179,531.64
  5. Step 5: Solve for x
    x = 3,626,179,531.64/84,704.32
  6. Step 6: Final answer
    x = 42,809.85

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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.