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Finding the Fourth Proportional to 73,266.30, 109,899.45 and 66,486.60

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Solution

The fourth proportional to 73,266.30, 109,899.45 and 66,486.60 is: 99,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,266.30 : 109,899.45 = 66,486.60 : x
  2. Step 2: Convert to fraction form
    73,266.30/109,899.45 = 66,486.60/x
  3. Step 3: Cross multiply
    73,266.30x = 109,899.45 × 66,486.60
  4. Step 4: Simplify right side
    73,266.30x = 7,306,840,772.37
  5. Step 5: Solve for x
    x = 7,306,840,772.37/73,266.30
  6. Step 6: Final answer
    x = 99,729.90

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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.