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Finding the Fourth Proportional to 126,408.60, 189,685.80 and 47,579.40

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Solution

The fourth proportional to 126,408.60, 189,685.80 and 47,579.40 is: 71,396.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,408.60 : 189,685.80 = 47,579.40 : x
  2. Step 2: Convert to fraction form
    126,408.60/189,685.80 = 47,579.40/x
  3. Step 3: Cross multiply
    126,408.60x = 189,685.80 × 47,579.40
  4. Step 4: Simplify right side
    126,408.60x = 9,025,136,552.52
  5. Step 5: Solve for x
    x = 9,025,136,552.52/126,408.60
  6. Step 6: Final answer
    x = 71,396.54

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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.