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Finding the Fourth Proportional to 74,906.80, 112,408.80 and 43,316.80

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Solution

The fourth proportional to 74,906.80, 112,408.80 and 43,316.80 is: 65,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,906.80 : 112,408.80 = 43,316.80 : x
  2. Step 2: Convert to fraction form
    74,906.80/112,408.80 = 43,316.80/x
  3. Step 3: Cross multiply
    74,906.80x = 112,408.80 × 43,316.80
  4. Step 4: Simplify right side
    74,906.80x = 4,869,189,507.84
  5. Step 5: Solve for x
    x = 4,869,189,507.84/74,906.80
  6. Step 6: Final answer
    x = 65,003.30

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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.