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Finding the Fourth Proportional to 52,139.70, 78,190.11 and 27,169.02

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Solution

The fourth proportional to 52,139.70, 78,190.11 and 27,169.02 is: 40,743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,139.70 : 78,190.11 = 27,169.02 : x
  2. Step 2: Convert to fraction form
    52,139.70/78,190.11 = 27,169.02/x
  3. Step 3: Cross multiply
    52,139.70x = 78,190.11 × 27,169.02
  4. Step 4: Simplify right side
    52,139.70x = 2,124,348,662.39
  5. Step 5: Solve for x
    x = 2,124,348,662.39/52,139.70
  6. Step 6: Final answer
    x = 40,743.40

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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.