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Finding the Fourth Proportional to 66,647.30, 91,975.03 and 39,805.29

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Solution

The fourth proportional to 66,647.30, 91,975.03 and 39,805.29 is: 54,932.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,647.30 : 91,975.03 = 39,805.29 : x
  2. Step 2: Convert to fraction form
    66,647.30/91,975.03 = 39,805.29/x
  3. Step 3: Cross multiply
    66,647.30x = 91,975.03 × 39,805.29
  4. Step 4: Simplify right side
    66,647.30x = 3,661,092,642.40
  5. Step 5: Solve for x
    x = 3,661,092,642.40/66,647.30
  6. Step 6: Final answer
    x = 54,932.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.