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Finding the Fourth Proportional to 66,270.84, 91,418.90 and 39,394.23

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Solution

The fourth proportional to 66,270.84, 91,418.90 and 39,394.23 is: 54,343.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,270.84 : 91,418.90 = 39,394.23 : x
  2. Step 2: Convert to fraction form
    66,270.84/91,418.90 = 39,394.23/x
  3. Step 3: Cross multiply
    66,270.84x = 91,418.90 × 39,394.23
  4. Step 4: Simplify right side
    66,270.84x = 3,601,376,975.98
  5. Step 5: Solve for x
    x = 3,601,376,975.98/66,270.84
  6. Step 6: Final answer
    x = 54,343.31

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1.5x scale

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.