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Finding the Fourth Proportional to 68,353.60, 102,511.20 and 21,620.80

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Solution

The fourth proportional to 68,353.60, 102,511.20 and 21,620.80 is: 32,425.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,353.60 : 102,511.20 = 21,620.80 : x
  2. Step 2: Convert to fraction form
    68,353.60/102,511.20 = 21,620.80/x
  3. Step 3: Cross multiply
    68,353.60x = 102,511.20 × 21,620.80
  4. Step 4: Simplify right side
    68,353.60x = 2,216,374,152.96
  5. Step 5: Solve for x
    x = 2,216,374,152.96/68,353.60
  6. Step 6: Final answer
    x = 32,425.13

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1.5x scale

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.