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Finding the Fourth Proportional to 65,139, 89,891.85 and 36,844.08

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Solution

The fourth proportional to 65,139, 89,891.85 and 36,844.08 is: 50,844.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,139 : 89,891.85 = 36,844.08 : x
  2. Step 2: Convert to fraction form
    65,139/89,891.85 = 36,844.08/x
  3. Step 3: Cross multiply
    65,139x = 89,891.85 × 36,844.08
  4. Step 4: Simplify right side
    65,139x = 3,311,982,512.75
  5. Step 5: Solve for x
    x = 3,311,982,512.75/65,139
  6. Step 6: Final answer
    x = 50,844.85

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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.