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Finding the Fourth Proportional to 273,976.20, 411,029.10 and 86,987.70

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Solution

The fourth proportional to 273,976.20, 411,029.10 and 86,987.70 is: 130,502.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,976.20 : 411,029.10 = 86,987.70 : x
  2. Step 2: Convert to fraction form
    273,976.20/411,029.10 = 86,987.70/x
  3. Step 3: Cross multiply
    273,976.20x = 411,029.10 × 86,987.70
  4. Step 4: Simplify right side
    273,976.20x = 35,754,476,042.07
  5. Step 5: Solve for x
    x = 35,754,476,042.07/273,976.20
  6. Step 6: Final answer
    x = 130,502.12

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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.