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Finding the Fourth Proportional to 66,115.64, 99,247.44 and 43,972.40

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Solution

The fourth proportional to 66,115.64, 99,247.44 and 43,972.40 is: 66,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,115.64 : 99,247.44 = 43,972.40 : x
  2. Step 2: Convert to fraction form
    66,115.64/99,247.44 = 43,972.40/x
  3. Step 3: Cross multiply
    66,115.64x = 99,247.44 × 43,972.40
  4. Step 4: Simplify right side
    66,115.64x = 4,364,147,634.42
  5. Step 5: Solve for x
    x = 4,364,147,634.42/66,115.64
  6. Step 6: Final answer
    x = 66,007.80

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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.