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Finding the Fourth Proportional to 74,729, 103,128.18 and 41,197.16

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Solution

The fourth proportional to 74,729, 103,128.18 and 41,197.16 is: 56,853.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,729 : 103,128.18 = 41,197.16 : x
  2. Step 2: Convert to fraction form
    74,729/103,128.18 = 41,197.16/x
  3. Step 3: Cross multiply
    74,729x = 103,128.18 × 41,197.16
  4. Step 4: Simplify right side
    74,729x = 4,248,588,131.97
  5. Step 5: Solve for x
    x = 4,248,588,131.97/74,729
  6. Step 6: Final answer
    x = 56,853.27

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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.