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Finding the Fourth Proportional to 84,680.33, 127,020.71 and 28,559.85

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Solution

The fourth proportional to 84,680.33, 127,020.71 and 28,559.85 is: 42,839.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,680.33 : 127,020.71 = 28,559.85 : x
  2. Step 2: Convert to fraction form
    84,680.33/127,020.71 = 28,559.85/x
  3. Step 3: Cross multiply
    84,680.33x = 127,020.71 × 28,559.85
  4. Step 4: Simplify right side
    84,680.33x = 3,627,692,281.69
  5. Step 5: Solve for x
    x = 3,627,692,281.69/84,680.33
  6. Step 6: Final answer
    x = 42,839.85

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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.