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Finding the Fourth Proportional to 132,419.20, 198,628.80 and 122,699.20

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Solution

The fourth proportional to 132,419.20, 198,628.80 and 122,699.20 is: 184,048.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,419.20 : 198,628.80 = 122,699.20 : x
  2. Step 2: Convert to fraction form
    132,419.20/198,628.80 = 122,699.20/x
  3. Step 3: Cross multiply
    132,419.20x = 198,628.80 × 122,699.20
  4. Step 4: Simplify right side
    132,419.20x = 24,371,594,856.96
  5. Step 5: Solve for x
    x = 24,371,594,856.96/132,419.20
  6. Step 6: Final answer
    x = 184,048.80

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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.