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Finding the Fourth Proportional to 65,401.88, 98,138.25 and 50,639.63

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Solution

The fourth proportional to 65,401.88, 98,138.25 and 50,639.63 is: 75,986.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,401.88 : 98,138.25 = 50,639.63 : x
  2. Step 2: Convert to fraction form
    65,401.88/98,138.25 = 50,639.63/x
  3. Step 3: Cross multiply
    65,401.88x = 98,138.25 × 50,639.63
  4. Step 4: Simplify right side
    65,401.88x = 4,969,684,178.16
  5. Step 5: Solve for x
    x = 4,969,684,178.16/65,401.88
  6. Step 6: Final answer
    x = 75,986.88

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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.