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Finding the Fourth Proportional to 60,486.21, 90,662.09 and 45,647.01

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Solution

The fourth proportional to 60,486.21, 90,662.09 and 45,647.01 is: 68,419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,486.21 : 90,662.09 = 45,647.01 : x
  2. Step 2: Convert to fraction form
    60,486.21/90,662.09 = 45,647.01/x
  3. Step 3: Cross multiply
    60,486.21x = 90,662.09 × 45,647.01
  4. Step 4: Simplify right side
    60,486.21x = 4,138,453,100.62
  5. Step 5: Solve for x
    x = 4,138,453,100.62/60,486.21
  6. Step 6: Final answer
    x = 68,419.78

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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.