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Finding the Fourth Proportional to 90,662, 125,113.64 and 50,918

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Solution

The fourth proportional to 90,662, 125,113.64 and 50,918 is: 70,266.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,662 : 125,113.64 = 50,918 : x
  2. Step 2: Convert to fraction form
    90,662/125,113.64 = 50,918/x
  3. Step 3: Cross multiply
    90,662x = 125,113.64 × 50,918
  4. Step 4: Simplify right side
    90,662x = 6,370,536,321.52
  5. Step 5: Solve for x
    x = 6,370,536,321.52/90,662
  6. Step 6: Final answer
    x = 70,266.88

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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.