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Finding the Fourth Proportional to 44,390, 66,617.80 and 21,016.44

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Solution

The fourth proportional to 44,390, 66,617.80 and 21,016.44 is: 31,540.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,390 : 66,617.80 = 21,016.44 : x
  2. Step 2: Convert to fraction form
    44,390/66,617.80 = 21,016.44/x
  3. Step 3: Cross multiply
    44,390x = 66,617.80 × 21,016.44
  4. Step 4: Simplify right side
    44,390x = 1,400,068,996.63
  5. Step 5: Solve for x
    x = 1,400,068,996.63/44,390
  6. Step 6: Final answer
    x = 31,540.19

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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.