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Finding the Fourth Proportional to 84,718.56, 127,040.92 and 28,548.20

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Solution

The fourth proportional to 84,718.56, 127,040.92 and 28,548.20 is: 42,809.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,718.56 : 127,040.92 = 28,548.20 : x
  2. Step 2: Convert to fraction form
    84,718.56/127,040.92 = 28,548.20/x
  3. Step 3: Cross multiply
    84,718.56x = 127,040.92 × 28,548.20
  4. Step 4: Simplify right side
    84,718.56x = 3,626,789,284.55
  5. Step 5: Solve for x
    x = 3,626,789,284.55/84,718.56
  6. Step 6: Final answer
    x = 42,809.86

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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.