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Finding the Fourth Proportional to 66,980, 92,432.40 and 37,172

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Solution

The fourth proportional to 66,980, 92,432.40 and 37,172 is: 51,297.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,980 : 92,432.40 = 37,172 : x
  2. Step 2: Convert to fraction form
    66,980/92,432.40 = 37,172/x
  3. Step 3: Cross multiply
    66,980x = 92,432.40 × 37,172
  4. Step 4: Simplify right side
    66,980x = 3,435,897,172.80
  5. Step 5: Solve for x
    x = 3,435,897,172.80/66,980
  6. Step 6: Final answer
    x = 51,297.36

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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.