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Finding the Fourth Proportional to 61,172.40, 91,672.20 and 37,729.20

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Solution

The fourth proportional to 61,172.40, 91,672.20 and 37,729.20 is: 56,540.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,172.40 : 91,672.20 = 37,729.20 : x
  2. Step 2: Convert to fraction form
    61,172.40/91,672.20 = 37,729.20/x
  3. Step 3: Cross multiply
    61,172.40x = 91,672.20 × 37,729.20
  4. Step 4: Simplify right side
    61,172.40x = 3,458,718,768.24
  5. Step 5: Solve for x
    x = 3,458,718,768.24/61,172.40
  6. Step 6: Final answer
    x = 56,540.51

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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.