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Finding the Fourth Proportional to 216,654.12, 324,951.12 and 66,899.34

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Solution

The fourth proportional to 216,654.12, 324,951.12 and 66,899.34 is: 100,339.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,654.12 : 324,951.12 = 66,899.34 : x
  2. Step 2: Convert to fraction form
    216,654.12/324,951.12 = 66,899.34/x
  3. Step 3: Cross multiply
    216,654.12x = 324,951.12 × 66,899.34
  4. Step 4: Simplify right side
    216,654.12x = 21,739,015,460.26
  5. Step 5: Solve for x
    x = 21,739,015,460.26/216,654.12
  6. Step 6: Final answer
    x = 100,339.73

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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.