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Finding the Fourth Proportional to 84,680.30, 127,020.67 and 28,559.83

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Solution

The fourth proportional to 84,680.30, 127,020.67 and 28,559.83 is: 42,839.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,680.30 : 127,020.67 = 28,559.83 : x
  2. Step 2: Convert to fraction form
    84,680.30/127,020.67 = 28,559.83/x
  3. Step 3: Cross multiply
    84,680.30x = 127,020.67 × 28,559.83
  4. Step 4: Simplify right side
    84,680.30x = 3,627,687,963.78
  5. Step 5: Solve for x
    x = 3,627,687,963.78/84,680.30
  6. Step 6: Final answer
    x = 42,839.81

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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.