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Finding the Fourth Proportional to 45,832.60, 68,748.90 and 21,208.60

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Solution

The fourth proportional to 45,832.60, 68,748.90 and 21,208.60 is: 31,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,832.60 : 68,748.90 = 21,208.60 : x
  2. Step 2: Convert to fraction form
    45,832.60/68,748.90 = 21,208.60/x
  3. Step 3: Cross multiply
    45,832.60x = 68,748.90 × 21,208.60
  4. Step 4: Simplify right side
    45,832.60x = 1,458,067,920.54
  5. Step 5: Solve for x
    x = 1,458,067,920.54/45,832.60
  6. Step 6: Final answer
    x = 31,812.90

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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.