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Finding the Fourth Proportional to 90,685.50, 125,145.99 and 50,941.50

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Solution

The fourth proportional to 90,685.50, 125,145.99 and 50,941.50 is: 70,299.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,685.50 : 125,145.99 = 50,941.50 : x
  2. Step 2: Convert to fraction form
    90,685.50/125,145.99 = 50,941.50/x
  3. Step 3: Cross multiply
    90,685.50x = 125,145.99 × 50,941.50
  4. Step 4: Simplify right side
    90,685.50x = 6,375,124,449.59
  5. Step 5: Solve for x
    x = 6,375,124,449.59/90,685.50
  6. Step 6: Final answer
    x = 70,299.27

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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.