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Finding the Fourth Proportional to 45,220.60, 67,811.70 and 21,854.20

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Solution

The fourth proportional to 45,220.60, 67,811.70 and 21,854.20 is: 32,772.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,220.60 : 67,811.70 = 21,854.20 : x
  2. Step 2: Convert to fraction form
    45,220.60/67,811.70 = 21,854.20/x
  3. Step 3: Cross multiply
    45,220.60x = 67,811.70 × 21,854.20
  4. Step 4: Simplify right side
    45,220.60x = 1,481,970,454.14
  5. Step 5: Solve for x
    x = 1,481,970,454.14/45,220.60
  6. Step 6: Final answer
    x = 32,772.02

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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.