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Finding the Fourth Proportional to 212,201.56, 318,302.42 and 54,430

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Solution

The fourth proportional to 212,201.56, 318,302.42 and 54,430 is: 81,645.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,201.56 : 318,302.42 = 54,430 : x
  2. Step 2: Convert to fraction form
    212,201.56/318,302.42 = 54,430/x
  3. Step 3: Cross multiply
    212,201.56x = 318,302.42 × 54,430
  4. Step 4: Simplify right side
    212,201.56x = 17,325,200,720.60
  5. Step 5: Solve for x
    x = 17,325,200,720.60/212,201.56
  6. Step 6: Final answer
    x = 81,645.02

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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.