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Finding the Fourth Proportional to 66,638.40, 99,892.32 and 33,308.64

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Solution

The fourth proportional to 66,638.40, 99,892.32 and 33,308.64 is: 49,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.40 : 99,892.32 = 33,308.64 : x
  2. Step 2: Convert to fraction form
    66,638.40/99,892.32 = 33,308.64/x
  3. Step 3: Cross multiply
    66,638.40x = 99,892.32 × 33,308.64
  4. Step 4: Simplify right side
    66,638.40x = 3,327,277,325.64
  5. Step 5: Solve for x
    x = 3,327,277,325.64/66,638.40
  6. Step 6: Final answer
    x = 49,930.33

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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.