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Finding the Fourth Proportional to 90,959.21, 136,435.73 and 27,776.78

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Solution

The fourth proportional to 90,959.21, 136,435.73 and 27,776.78 is: 41,664.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,959.21 : 136,435.73 = 27,776.78 : x
  2. Step 2: Convert to fraction form
    90,959.21/136,435.73 = 27,776.78/x
  3. Step 3: Cross multiply
    90,959.21x = 136,435.73 × 27,776.78
  4. Step 4: Simplify right side
    90,959.21x = 3,789,744,574.17
  5. Step 5: Solve for x
    x = 3,789,744,574.17/90,959.21
  6. Step 6: Final answer
    x = 41,664.22

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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.