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Finding the Fourth Proportional to 81,350.87, 121,979.58 and 43,353.36

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Solution

The fourth proportional to 81,350.87, 121,979.58 and 43,353.36 is: 65,005.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,350.87 : 121,979.58 = 43,353.36 : x
  2. Step 2: Convert to fraction form
    81,350.87/121,979.58 = 43,353.36/x
  3. Step 3: Cross multiply
    81,350.87x = 121,979.58 × 43,353.36
  4. Step 4: Simplify right side
    81,350.87x = 5,288,224,502.01
  5. Step 5: Solve for x
    x = 5,288,224,502.01/81,350.87
  6. Step 6: Final answer
    x = 65,005.14

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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.