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Finding the Fourth Proportional to 45,564.60, 68,330.70 and 20,616.60

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Solution

The fourth proportional to 45,564.60, 68,330.70 and 20,616.60 is: 30,917.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,564.60 : 68,330.70 = 20,616.60 : x
  2. Step 2: Convert to fraction form
    45,564.60/68,330.70 = 20,616.60/x
  3. Step 3: Cross multiply
    45,564.60x = 68,330.70 × 20,616.60
  4. Step 4: Simplify right side
    45,564.60x = 1,408,746,709.62
  5. Step 5: Solve for x
    x = 1,408,746,709.62/45,564.60
  6. Step 6: Final answer
    x = 30,917.57

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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.