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Finding the Fourth Proportional to 90,309.71, 124,621.89 and 50,021.12

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Solution

The fourth proportional to 90,309.71, 124,621.89 and 50,021.12 is: 69,026.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,309.71 : 124,621.89 = 50,021.12 : x
  2. Step 2: Convert to fraction form
    90,309.71/124,621.89 = 50,021.12/x
  3. Step 3: Cross multiply
    90,309.71x = 124,621.89 × 50,021.12
  4. Step 4: Simplify right side
    90,309.71x = 6,233,725,891.21
  5. Step 5: Solve for x
    x = 6,233,725,891.21/90,309.71
  6. Step 6: Final answer
    x = 69,026.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.