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Finding the Fourth Proportional to 90,697.70, 125,163.30 and 50,415.21

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Solution

The fourth proportional to 90,697.70, 125,163.30 and 50,415.21 is: 69,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,697.70 : 125,163.30 = 50,415.21 : x
  2. Step 2: Convert to fraction form
    90,697.70/125,163.30 = 50,415.21/x
  3. Step 3: Cross multiply
    90,697.70x = 125,163.30 × 50,415.21
  4. Step 4: Simplify right side
    90,697.70x = 6,310,134,101.06
  5. Step 5: Solve for x
    x = 6,310,134,101.06/90,697.70
  6. Step 6: Final answer
    x = 69,573.25

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1.5x scale

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.