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Finding the Fourth Proportional to 74,755.44, 103,128.12 and 47,885.04

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Solution

The fourth proportional to 74,755.44, 103,128.12 and 47,885.04 is: 66,059.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,755.44 : 103,128.12 = 47,885.04 : x
  2. Step 2: Convert to fraction form
    74,755.44/103,128.12 = 47,885.04/x
  3. Step 3: Cross multiply
    74,755.44x = 103,128.12 × 47,885.04
  4. Step 4: Simplify right side
    74,755.44x = 4,938,294,151.32
  5. Step 5: Solve for x
    x = 4,938,294,151.32/74,755.44
  6. Step 6: Final answer
    x = 66,059.33

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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.