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Finding the Fourth Proportional to 90,958.68, 136,485.41 and 68,765.49

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Solution

The fourth proportional to 90,958.68, 136,485.41 and 68,765.49 is: 103,184.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,958.68 : 136,485.41 = 68,765.49 : x
  2. Step 2: Convert to fraction form
    90,958.68/136,485.41 = 68,765.49/x
  3. Step 3: Cross multiply
    90,958.68x = 136,485.41 × 68,765.49
  4. Step 4: Simplify right side
    90,958.68x = 9,385,485,752.67
  5. Step 5: Solve for x
    x = 9,385,485,752.67/90,958.68
  6. Step 6: Final answer
    x = 103,184.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.