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Finding the Fourth Proportional to 543,422.20, 815,169.30 and 144,057.40

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Solution

The fourth proportional to 543,422.20, 815,169.30 and 144,057.40 is: 216,095.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,422.20 : 815,169.30 = 144,057.40 : x
  2. Step 2: Convert to fraction form
    543,422.20/815,169.30 = 144,057.40/x
  3. Step 3: Cross multiply
    543,422.20x = 815,169.30 × 144,057.40
  4. Step 4: Simplify right side
    543,422.20x = 117,431,169,917.82
  5. Step 5: Solve for x
    x = 117,431,169,917.82/543,422.20
  6. Step 6: Final answer
    x = 216,095.64

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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.