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Finding the Fourth Proportional to 66,281.96, 99,422.96 and 54,570.58

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Solution

The fourth proportional to 66,281.96, 99,422.96 and 54,570.58 is: 81,855.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,281.96 : 99,422.96 = 54,570.58 : x
  2. Step 2: Convert to fraction form
    66,281.96/99,422.96 = 54,570.58/x
  3. Step 3: Cross multiply
    66,281.96x = 99,422.96 × 54,570.58
  4. Step 4: Simplify right side
    66,281.96x = 5,425,568,071.11
  5. Step 5: Solve for x
    x = 5,425,568,071.11/66,281.96
  6. Step 6: Final answer
    x = 81,855.88

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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.