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Finding the Fourth Proportional to 74,408.40, 111,353.40 and 51,080.40

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Solution

The fourth proportional to 74,408.40, 111,353.40 and 51,080.40 is: 76,442.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,408.40 : 111,353.40 = 51,080.40 : x
  2. Step 2: Convert to fraction form
    74,408.40/111,353.40 = 51,080.40/x
  3. Step 3: Cross multiply
    74,408.40x = 111,353.40 × 51,080.40
  4. Step 4: Simplify right side
    74,408.40x = 5,687,976,213.36
  5. Step 5: Solve for x
    x = 5,687,976,213.36/74,408.40
  6. Step 6: Final answer
    x = 76,442.66

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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.