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Finding the Fourth Proportional to 77,236.60, 115,835.46 and 30,489.88

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Solution

The fourth proportional to 77,236.60, 115,835.46 and 30,489.88 is: 45,727.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,236.60 : 115,835.46 = 30,489.88 : x
  2. Step 2: Convert to fraction form
    77,236.60/115,835.46 = 30,489.88/x
  3. Step 3: Cross multiply
    77,236.60x = 115,835.46 × 30,489.88
  4. Step 4: Simplify right side
    77,236.60x = 3,531,809,275.14
  5. Step 5: Solve for x
    x = 3,531,809,275.14/77,236.60
  6. Step 6: Final answer
    x = 45,727.15

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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.