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Finding the Fourth Proportional to 68,289.20, 102,448.20 and 21,546.80

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Solution

The fourth proportional to 68,289.20, 102,448.20 and 21,546.80 is: 32,324.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,289.20 : 102,448.20 = 21,546.80 : x
  2. Step 2: Convert to fraction form
    68,289.20/102,448.20 = 21,546.80/x
  3. Step 3: Cross multiply
    68,289.20x = 102,448.20 × 21,546.80
  4. Step 4: Simplify right side
    68,289.20x = 2,207,430,875.76
  5. Step 5: Solve for x
    x = 2,207,430,875.76/68,289.20
  6. Step 6: Final answer
    x = 32,324.74

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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.