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Finding the Fourth Proportional to 90,426.59, 124,791.78 and 50,138

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Solution

The fourth proportional to 90,426.59, 124,791.78 and 50,138 is: 69,192.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,426.59 : 124,791.78 = 50,138 : x
  2. Step 2: Convert to fraction form
    90,426.59/124,791.78 = 50,138/x
  3. Step 3: Cross multiply
    90,426.59x = 124,791.78 × 50,138
  4. Step 4: Simplify right side
    90,426.59x = 6,256,810,265.64
  5. Step 5: Solve for x
    x = 6,256,810,265.64/90,426.59
  6. Step 6: Final answer
    x = 69,192.15

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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.