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Finding the Fourth Proportional to 279,309.51, 418,959.41 and 68,947.65

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Solution

The fourth proportional to 279,309.51, 418,959.41 and 68,947.65 is: 103,420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,309.51 : 418,959.41 = 68,947.65 : x
  2. Step 2: Convert to fraction form
    279,309.51/418,959.41 = 68,947.65/x
  3. Step 3: Cross multiply
    279,309.51x = 418,959.41 × 68,947.65
  4. Step 4: Simplify right side
    279,309.51x = 28,886,266,420.15
  5. Step 5: Solve for x
    x = 28,886,266,420.15/279,309.51
  6. Step 6: Final answer
    x = 103,420.28

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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.