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Finding the Fourth Proportional to 81,224.68, 121,864.68 and 43,788.37

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Solution

The fourth proportional to 81,224.68, 121,864.68 and 43,788.37 is: 65,697.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,224.68 : 121,864.68 = 43,788.37 : x
  2. Step 2: Convert to fraction form
    81,224.68/121,864.68 = 43,788.37/x
  3. Step 3: Cross multiply
    81,224.68x = 121,864.68 × 43,788.37
  4. Step 4: Simplify right side
    81,224.68x = 5,336,255,697.77
  5. Step 5: Solve for x
    x = 5,336,255,697.77/81,224.68
  6. Step 6: Final answer
    x = 65,697.47

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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.