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Finding the Fourth Proportional to 220,459.76, 330,881.61 and 125,879.30

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Solution

The fourth proportional to 220,459.76, 330,881.61 and 125,879.30 is: 188,928.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,459.76 : 330,881.61 = 125,879.30 : x
  2. Step 2: Convert to fraction form
    220,459.76/330,881.61 = 125,879.30/x
  3. Step 3: Cross multiply
    220,459.76x = 330,881.61 × 125,879.30
  4. Step 4: Simplify right side
    220,459.76x = 41,651,144,800.05
  5. Step 5: Solve for x
    x = 41,651,144,800.05/220,459.76
  6. Step 6: Final answer
    x = 188,928.56

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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.