Home / 66,103.63-99,134.39-21,720.09

Finding the Fourth Proportional to 66,103.63, 99,134.39 and 21,720.09

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Solution

The fourth proportional to 66,103.63, 99,134.39 and 21,720.09 is: 32,573.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,103.63 : 99,134.39 = 21,720.09 : x
  2. Step 2: Convert to fraction form
    66,103.63/99,134.39 = 21,720.09/x
  3. Step 3: Cross multiply
    66,103.63x = 99,134.39 × 21,720.09
  4. Step 4: Simplify right side
    66,103.63x = 2,153,207,268.62
  5. Step 5: Solve for x
    x = 2,153,207,268.62/66,103.63
  6. Step 6: Final answer
    x = 32,573.21

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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.