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Finding the Fourth Proportional to 66,486.97, 99,740.40 and 21,493.27

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Solution

The fourth proportional to 66,486.97, 99,740.40 and 21,493.27 is: 32,243.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.97 : 99,740.40 = 21,493.27 : x
  2. Step 2: Convert to fraction form
    66,486.97/99,740.40 = 21,493.27/x
  3. Step 3: Cross multiply
    66,486.97x = 99,740.40 × 21,493.27
  4. Step 4: Simplify right side
    66,486.97x = 2,143,747,347.11
  5. Step 5: Solve for x
    x = 2,143,747,347.11/66,486.97
  6. Step 6: Final answer
    x = 32,243.12

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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.