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Finding the Fourth Proportional to 84,720.60, 127,092.60 and 28,576.80

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Solution

The fourth proportional to 84,720.60, 127,092.60 and 28,576.80 is: 42,869.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,720.60 : 127,092.60 = 28,576.80 : x
  2. Step 2: Convert to fraction form
    84,720.60/127,092.60 = 28,576.80/x
  3. Step 3: Cross multiply
    84,720.60x = 127,092.60 × 28,576.80
  4. Step 4: Simplify right side
    84,720.60x = 3,631,899,811.68
  5. Step 5: Solve for x
    x = 3,631,899,811.68/84,720.60
  6. Step 6: Final answer
    x = 42,869.15

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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.