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Finding the Fourth Proportional to 65,149.14, 89,979.48 and 43,891.50

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Solution

The fourth proportional to 65,149.14, 89,979.48 and 43,891.50 is: 60,619.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,149.14 : 89,979.48 = 43,891.50 : x
  2. Step 2: Convert to fraction form
    65,149.14/89,979.48 = 43,891.50/x
  3. Step 3: Cross multiply
    65,149.14x = 89,979.48 × 43,891.50
  4. Step 4: Simplify right side
    65,149.14x = 3,949,334,346.42
  5. Step 5: Solve for x
    x = 3,949,334,346.42/65,149.14
  6. Step 6: Final answer
    x = 60,619.90

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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.