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Finding the Fourth Proportional to 66,451.43, 99,515.22 and 43,948.40

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Solution

The fourth proportional to 66,451.43, 99,515.22 and 43,948.40 is: 65,815.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,451.43 : 99,515.22 = 43,948.40 : x
  2. Step 2: Convert to fraction form
    66,451.43/99,515.22 = 43,948.40/x
  3. Step 3: Cross multiply
    66,451.43x = 99,515.22 × 43,948.40
  4. Step 4: Simplify right side
    66,451.43x = 4,373,534,694.65
  5. Step 5: Solve for x
    x = 4,373,534,694.65/66,451.43
  6. Step 6: Final answer
    x = 65,815.51

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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.