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Finding the Fourth Proportional to 68,443.20, 102,620.40 and 28,989.60

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Solution

The fourth proportional to 68,443.20, 102,620.40 and 28,989.60 is: 43,465.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,443.20 : 102,620.40 = 28,989.60 : x
  2. Step 2: Convert to fraction form
    68,443.20/102,620.40 = 28,989.60/x
  3. Step 3: Cross multiply
    68,443.20x = 102,620.40 × 28,989.60
  4. Step 4: Simplify right side
    68,443.20x = 2,974,924,347.84
  5. Step 5: Solve for x
    x = 2,974,924,347.84/68,443.20
  6. Step 6: Final answer
    x = 43,465.59

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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.