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Finding the Fourth Proportional to 66,305.03, 99,463.44 and 18,919.23

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Solution

The fourth proportional to 66,305.03, 99,463.44 and 18,919.23 is: 28,380.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,305.03 : 99,463.44 = 18,919.23 : x
  2. Step 2: Convert to fraction form
    66,305.03/99,463.44 = 18,919.23/x
  3. Step 3: Cross multiply
    66,305.03x = 99,463.44 × 18,919.23
  4. Step 4: Simplify right side
    66,305.03x = 1,881,771,697.95
  5. Step 5: Solve for x
    x = 1,881,771,697.95/66,305.03
  6. Step 6: Final answer
    x = 28,380.53

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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.