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Finding the Fourth Proportional to 54,279.70, 81,423.60 and 19,214.80

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Solution

The fourth proportional to 54,279.70, 81,423.60 and 19,214.80 is: 28,823.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,279.70 : 81,423.60 = 19,214.80 : x
  2. Step 2: Convert to fraction form
    54,279.70/81,423.60 = 19,214.80/x
  3. Step 3: Cross multiply
    54,279.70x = 81,423.60 × 19,214.80
  4. Step 4: Simplify right side
    54,279.70x = 1,564,538,189.28
  5. Step 5: Solve for x
    x = 1,564,538,189.28/54,279.70
  6. Step 6: Final answer
    x = 28,823.63

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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.