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Finding the Fourth Proportional to 76,983.20, 115,474.80 and 35,511.20

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Solution

The fourth proportional to 76,983.20, 115,474.80 and 35,511.20 is: 53,266.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,983.20 : 115,474.80 = 35,511.20 : x
  2. Step 2: Convert to fraction form
    76,983.20/115,474.80 = 35,511.20/x
  3. Step 3: Cross multiply
    76,983.20x = 115,474.80 × 35,511.20
  4. Step 4: Simplify right side
    76,983.20x = 4,100,648,717.76
  5. Step 5: Solve for x
    x = 4,100,648,717.76/76,983.20
  6. Step 6: Final answer
    x = 53,266.80

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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.