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Finding the Fourth Proportional to 67,285.70, 100,929.33 and 28,812.02

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Solution

The fourth proportional to 67,285.70, 100,929.33 and 28,812.02 is: 43,218.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,285.70 : 100,929.33 = 28,812.02 : x
  2. Step 2: Convert to fraction form
    67,285.70/100,929.33 = 28,812.02/x
  3. Step 3: Cross multiply
    67,285.70x = 100,929.33 × 28,812.02
  4. Step 4: Simplify right side
    67,285.70x = 2,907,977,874.55
  5. Step 5: Solve for x
    x = 2,907,977,874.55/67,285.70
  6. Step 6: Final answer
    x = 43,218.36

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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.